Anatomy and Physiology (1st) Flashcards
All information that was taught to me while attending Vanier College's "Animal Health Technology" Program, located in St-Laurent Montreal.
What is the median plane?
Divides the body into equal left and right halves
What is the Sagittal plane?
Divides the body into left and right parts that are not necessarily equal
What is a transverse plane?
Divides the body into cranial and caudal parts
What is the dorsal plane?
Divides the body into dorsal and ventral parts
What does cranial mean?
Toward the head ; or the front surface of a limb proximal to the carpus or tarsus
What does caudal mean
Toward the tail; also the back surface of a limb proximal to the carpus or tarsus
What does rostral mean?
Toward the tip of the nose
What does dorsal mean?
Toward the top surface of the body ; also the top/front surface of a limb distal to the carpus or tarsus
What does ventral mean?
Toward the bottom (belly) surface of the body
What does medial mean?
Toward the median plane
What does lateral mean?
Away from the median plane
What does deep mean?
Toward the center of the body or a body part
What does proximal mean?
Toward the body (used for appendages)
What does distal mean?
Away from the body (used for appendages)
What does palmar mean?
Ground/back surface of front limb distal to carpus
What does plantar mean?
Ground/back surface of hind limb distal to the tarsus
What is a cranial surface?
The front part of a leg (what enters the building first) above the knee
What is a caudal surface?
The “back” surface of a leg above the knee
What is a dorsal surface?
The front of leg (below knee) and top of foot
What is a palmar surface ?
(Front legs only) The “back” part of leg (below the knee) including the bottom of the foot
What is a plantar surface?
(Back legs only) The “back” part of leg (below the knee) including the bottom of the foot
What is a barrel?
The trunk of the body-formed by the rib cage and the abdomen
What is a flank?
Lateral surface of the abdomen between the last rib and the hind legs
What is a brisket?
Area of the base of the neck between the front legs that covers the cranial end of the sternum
What is a poll?
Top of the head between the bases of the ears
What is a muzzle
Rostral part of the face formed mainly by the maxillary and nasal bones
What is a withers?
Area dorsal to scapulas
What is a tailhead?
Dorsal part of the base of the tail
What is a hock?
Tarsus
What is a stifle?
Femorotibial/fenoropatellar joint-equivalent to the human knee
What is a fetlock?
Joint between cannon bone (large metacarpal/metatarsal) and the proximal phalanx of hoofed animals
What is a knee?
Carpus of hoofed animals
What is a cannon?
Large metacarpal or metatarsal bone of hoofed animals
What is a Pastern?
Area of the proximal phalanx of hoofed animals
What is dorsal recumbency?
Lying on the back (dorsal body surface) with the ventral side facing up
What is lateral recumbency?
Lying on the side
What is left lateral recumbency?
Left side down
What is right lateral recumbency?
Right side down
What is sternal recumbency?
Lying in the sternum (ventral body surface) with the dorsal surface facing up
What is oblique recumbency ?
The body is tilted between dorsal or sternal recumbency and lateral recumbency (referred to by a combination of other position terms)
What are the four types of tissues?
epithelial tissue connective tissue muscle tissue nervous tissue
What is the function of epithelial tissue?
It covers and lines
What is the function of connective tissue?
It provides support
What is the function of muscle tissue?
It enables movement
What is the function of nervous tissue?
Controls work
What is gross anatomy?
The study of anatomical structures that can be seen with the naked eye includes learning the names and locations of bones, muscles, arteries, veins, and nerves
What is histology?
The study of tissues
What is microanatomy?
The study of anatomical structures that can be seen with the use of microscope
What is unique about a unicellular organism?
It can feed itself, respire, grow and produce or find all of the biochemical substances that it needs without the assistance of other cells
What are tissues?
Cells of similar type and function that are clustered into layers, sheets, or groups
What is a general function of epithelial tissue
It is protective of underlying tissues and frequently acts as a filter of biochemical substances as well as being absorptive. It also secretes biochemical substances
What are glandular epithelia?
Epithelia that engage in the manufacturing and release of substances
Where are goblet cells found and what are they an example of
Glandular epithelial cells
What are the two ways glandular epithelial cells can occur
As individuals or as organized glands
Give an example of some substances that are produced by glandular epithelia
Hormones, enzymes, milk, sweat
What are excretions
Substances that ultimately leave the body ie. sweat, urine, feces
What are secretions
Substances that remain within the body
What are the six functions of epithelia
Protects, covers, linesFilters biochemical substancesAbsorbs nutrientsProvides sensory inputManufactures secretionsManufactures excretions
What are the four general characteristics of epithelia
- epithelial cells are polar 2. epithelial cells have lateral surfaces that are connected to neighboring cells by junctional complexes.3. all epithelial cells lack blood vessels or capillaries. 4. most epithelial cells are innervated and provide valuable sensory input
What does polar mean
They have a sense of direction relative to surrounding structures
What is an apical surface
The apical surface is the side of the cell that faces the lumen or body cavity
What is a basal surface
This side of the cell that faces the underlying connective tissue
What does avascular mean
Lacking blood vessels or capillaries
What does innervated mean
Containing nerves
What are the three major types of cellular junctions found between epithelial cells
Tight junctions, desmosomes, gap junctions
What is a tight junction
It is formed by the fusion of the outermost layers of the plasma membranes of adjoining cells
Where are tight junctions found
Tight junctions are found in tissues in which there can be no leaks. for example: urinary bladder, digestive tract
What is a desmosome
A strong welded plaque or thickening which connects the plasma membranes of adjacent cells
What is plaque
A thickening
What is a hemidesmosome
Junctions that look like half of a desmosome
What are tonofilaments
Thin filaments that provide the structural support for certain membrane junctions. tonal filaments are especially important in tissue that needs to flex
Where are desmosomes commonly found
They are found most commonly in tissues that undergo repeated episodes of tension and stretching such as the skin, heart, uterus.
What are Connexons
Tubular channel proteins
What is a transmembrane protein
transmembrane proteins allows the exchange and passage of ions and nutrients such as nucleotides, sugars, amino acids from one cell to the other.
Where are gap junctions most commonly found
Gap junctions are most commonly found in intestinal epithelial cells, the heart, smooth muscle tissue
What is the function of gap junctions and what are they commonly known for
The function of gap junctions is to quickly transport electrical signals from one cell to another. They’re commonly known for the contraction of cardiac and smooth muscle
What is a basement membrane
It is a non-living meshwork of fibers that cement the epithelial cells to the underlying connective tissue
What does the basement membrane protect the cell from
Being torn off by intraluminal pressures such as stretching or erosion
How are oxygen and nutrient molecules supplied to the epithelial cells
They are supplied to epithelial cells by diffusing through the basement membrane from Capillaries in the underlying connective tissue
What does the basement membrane act as
It acts as a partial barrier between epithelial cells and underlying connective tissue
What are microvilli
Fingerlike protrusions of the luminal surface of some epithelial membranes that increase the cells exposed surface area
What is a brush border
The surface of a cell covered with microvilli
When the surface area increases…
The absorptive ability increases
What cells do microvilli usually occur on
Cells involved in absorption or secretion such as ones in the intestinal and urinary tracts
What is Keratin
A tough waterproof proteins that makes scales, claws, feathers, nails, hair, horns, huffs
What are the three characteristics that are used to classify epithelial tissue
- Number of layers of cells2. Shape of cells3. Presence of surface specializations
What are simple epithelia
Single layer of epithelial cells that provides little protection to underlying connective tissue
What are stratified epithelia
Containing many layers of cells thicker, stronger and found in areas of the body that are subjected to mechanical and chemical stress
What is cuboidal epithelium
Epithelium composed of cube shaped cells having centrally located nuclei
What is columnar epithelium
Epithelium composed of tall, thin, epithelial cells having nuclei located at their basal end and are often ciliated
What are squamous epithelium
Epithelium composed of flat, hexagonal cells
What is mesothelium
The epithelium that lines the pleural pericardial and peritoneal cavities
What two cells make up the gut lining
Absorptive cell, goblet cell
What is the function of a goblet cell
Manufacture and store lubricating mucus that is secreted onto the luminal surfaces of the epithelia
What are immunoglobulins
Disease fighting molecules that help to protect animals from pathogens that have been inhaled
What is a pathogen
Bacteria and viruses
What is transitional epithelium
Epithelium that can expand and contract thus enabling it to hold a good deal of volume
Where is transitional epithelium located
Portions of the urinary tract: urinary bladder, ureters, urethra and kidney
What is a gland
A cell or a group of cells that have the ability to manufacture and discharge secretion
What are secretions
Specialize protein molecules that are produced in the rough endoplasmic recticulum, packaged into granules by the Golgi apparatus, discharged from the cell
What are the six classifying characteristics of glands
- Presence or absence of ducts (endocrine or exocrine)2. Number of cells that compose them (unicellular and multicellular)3. Shape of the secreting ducts (simple or compound)4. Complexity of the glandular structure (tubular, acinar, tubuloacinar)5. Type of secretion produced (mucoid or serous)6. Manner in which the secretion is stored and discharged ( merocrine, apocrine, holocrine)
What are endocrine glands
Glands that do not have ducts or tubules and who secretions are distributed throughout the body
What are hormones
Regulatory chemicals
What are exocrine glands
Glands that possessed ducts
What is the function of the endocrine glands
Discharge secretions via their ducts directly into nearby areas where they may for example cover cell surfaces or empty into body cavities
Unlike endocrine glands, exocrine glands…
Act locally and do not normally enter the circulation
What is an example of a unicellular exocrine gland
The ductless goblet gland
What do goblet cells secrete
Mucin: thick, stringy mixture of glycoproteins and proteoglycans that when mixed with water becomes mucus
What are the two distinct components of a multicellular exocrine gland
Secretory unit in which secretions are produced by secretory cells and a duct that carries the secretion to the deposition site
What is a simple gland
An exocrine gland with unbranched ducts
What is a compound gland
An exocrine gland with branched ducts
What is a tubular Gland
Secretory unit of exocrine glands either containing or composed of tubules
What is an alveolar gland
A gland where the secretory unit forms a rounded sack
What are glands with secretary units that possess both tubular and alveolar qualities called
Tubuloacinar
What are merocrine glands
Glands who’s secretions contain none of their own cells thus leaving the Glands cells intact. example: saliva and sweat glands
What is an apocrine gland
Gland who secretions contain some of it’s cellular material.
What is a holocrine gland
A gland who’s granular secretions contain not only that secretory product but also the cells themselves
What is serous secretions
Watery, contain a high concentration of enzymes
What are mucous secretions
Thick, viscous, composed of glycoproteins
What are mixed endocrine glands
Glands that contain both mucous And serous components
What is mesoderm
The middle layer of fetal body tissue
What is adipose connective tissue
Vascular type of connective tissue who’s general functions are to protect, insulate and provide a major source of energy to the body
What are extracellular fibers
The fibers of connective tissue located outside of the cells that perform a variety of functions depending on their degree of elasticity
What is the extracellular matrix
The mixture of fiber and ground substance
What are glycosaminoglycan’s
Unbranched chains of glycoproteins
What are the three type of fibers connective tissue contains
Collagenous, recticular, Elastic
What are collagenous fibers
Strong, thick strands composed of the structural protein collagen
What are reticular fibers
Thin fibers composed of collagen
What are elastic fibers composed of
The protein Elastin
What is a fibroblast
Large, irregularly shaped cells that manufacture and secrete both fibers and ground substance characteristic of their particular matrix
What fixed cell does cartilage contain
ChondroblSt
What are reticular cells
Cells that are flat, star shaped with long, outreaching arms that touch other cells forming net like connections with the tissue they compose
What are leukocytes
White blood cells that move into connective tissue in large numbers during times of infection
What is diapedesis
The process by which white blood cells squeeze through walls of tiny blood vessels into the surrounding tissue
What are mast cells
Oval cells that are easily identified by the large number of dark staining granules Stored in the cytoplasm
What does histamine do
Histamine increases blood flow to the area by making capillaries leaky
What does heparin do
Prevents blood from clotting and ensures the pathways for increased bloodflow remain open
What are microphages
Masses irregularly shaped phagocytizing scavengers that may be either fixed or transient in connective tissue. They engulf microbes, dead cells and debris and subsequently digest them in the lysosomes
What are the two subclasses of connective tissue
Loose connective tissue and dense connective tissue
What does loose connective tissue contain
Areolar, adipose and reticular tissue
What does dense connective tissue contain
Dense regular, dense irregular, elastic tissue
What is Areolar connective tissue
Randomly placed fibers and cells suspended in a thick, translucent ground substance
What is adipose tissue
Fat
What are the two main types of adipose tissue
White adipose tissue and brown adipose tissue
Where is white adipose tissue found
Throughout the body in deep layers of skin
Where is brown adipose tissue found
It is found in newborn animals and animals that hibernate during the winter
What is reticular connective tissue composed of
Complex, three dimensional network of thin, reticular fibers
What is the stroma
A network which constitutes the framework of several organs
What is dense fibrous connective tissue characterized by
Densely packed arrangement of collagen fibers
What is dense regular connective tissue composed of
Tightly packed, parallel collagen fibers. The fibers lie in the direction of the force that is exerted on them, thereby giving the overall tissue tremendous strength but only in one direction
What is a Fascia
A structure that can withstand forces from more than one direction
What is elastic connective tissue
Dense connective tissue that is primarily composed of elastic fibers rather than collagen fibers
Where are simple tubular glands found
Stomach, intestines
Where are coiled tubular glands found
Sweat glands
Where are branched tubular glands found
Stomach, mouth, tongue
Where are simple aveolar glands found
Sebaceous glands
Where are branched aveolar glands found
Sebaceous glands
Where are compound tubular glands found
Bulbourethral glands, mammary glands, mucous glands
Where are compound aveolar glands found
Mammary glands
Where are compound tubuloalveolar glands found
Salivary gland, pancreas, respiratory passages
What is cartilage
Tough, specialized connective tissue that is commonly known as gristle
What is chondrocyte and where do they live
Cartilage cells, lives in hollowed out pockets in the matrix called lacunae
What is hyaline cartilage
Composed of closely packed collagen fibers that make it tough but more flexible than bone
What is articular cartilage
Cartilage at the ends of long bones and joints and connection ribs to the sternum
What is elastic cartilage
Similar to hyaline cartilage but contains more elastic fibers which form dense, branching bundles that appear black microscopically
What is fibrocartilage
Contains text bundles of collagen fibers like hyaline cartilage but has fewer chondrocytes and lacks a perichondrium
What is bone
Hardest and most rigid type of connective tissue
What does a Haversian canal contain
Both a vascular and a nerve supply
What do osteoblast do
Manufacture the fibers that are part of the matrix
What is blood
Red fluid that passes through vessels and that carries nutrient molecules and gases throughout the body
What are Erythrocytes
Red blood cells
What are leukocytes
White blood cells
What are thrombocytes
Platelets
What are three examples of loose connective tissue
Areolar, adipose, recticular
What are three examples of dense connective tissue
Dense regular, dense irregular, elastic
What are three examples of cartilage
Hyalin cartilage, elastic cartilage, fibrocartilage
What are two examples of bones
Compact, cancellous
What are the two broad categories of connective tissue
Loose connective tissue, dense connective tissue
What are serous membranes
Lined the walls and cover the organs that fill closed body cavities
What is the portion of the membrane that lines the cavity wall called
Parietal layer
What is the portion of the membrane that covers the outer surface of organs called
Visceral layer
What is a transudate
Thin fluid containing small amounts of protein or no protein that has been passed through membrane
What is a hemothorax
When blood cells and fluid leak from ruptured capillaries into the pleural space
What is a exudate
When cells, protein and other solid material mixed with serous fluid
What is effusion
When an abnormally large amount of fluid enters the body cavity
What is ascites
Fluid accumulation in the peritoneal cavity
What is pleuritis
Inflammation of the Pleura
What is pericarditis
Inflammation of the pericardial tissue
What is peritonitis
Inflammation of the peritoneum
What are. Adhesions
Abnormal connections between Parietal and visceral layers
What is a membrane
Epithelium plus connective tissues
What does it mean if a tissue is regular
It means that it is parallel
What do tendons do
Connect muscle to bones
What do ligaments do
Connect bone to bone
What do fascia do
Surrounds muscles
What does reticular mean
A network
What are two cell types in connective tissues
Fixed cells and wandering cells
What do fixed cells do and given example of it
Fixed cells remain in connective tissue and an example is fibroblast
What do osteoclasts do
Breaks down bone
What are wandering cells and give an example
Leave connective tissue as needed and microphages