Tissue Level Flashcards
The function of a certain part of an organ depends on what?
TISSUES
The 4 Primary Types of Tissues are:
- Nervous Tissue
- Muscle Tissue
- Epithelial Tissue
- Connective Tissue
The basic function of the 4 primary types of tissues are:
- Nervous Tissue
- control & communication - Muscle Tissue
- movement - Epithelial tissue
- line organs
- cover & protect the body - Connective Tissue
- provide support
What does Histology mean?
Histology is the study of tissues.
*derived from the word “Histos” = tissues and “Logia” = science
Who is the Father of Microbiology?
Anton Van Leeuwenhoek
What are the 3 steps of viewing a specimen under a microscope?
- Preserve or Fix it
- Slice into thin sections
- Stain it
What is Carmine?
Carmine is a red dye derived from scales of crushed-up cochineal insects. It is used to examine different cellular structures.
The nervous system is made up of which type of tissues?
NERVOUS TISSUE
What are the 2 FUNCTIONS of the nervous tissue?
- Sensing stimuli
- Sending electrical impulses throughout the body
The 2 CELL TYPES of nervous tissues are known as?
NEURONS and GLIAL CELLS
What cell type is described as specialized building blocks that generate and conduct electrochemical nerve impulses?
NEURONS
This cell type provides support, insulation, and protection as well as tethering to blood vessels.
GLIAL CELLS
Every neuron is composed of what parts?
- Cell Body
- Dendrites
- Axon
This part is also known as Soma and it is the neuron’s life support which contains the nucleus, mitochondria, and DNA.
CELL BODY
What are dendrites and their function/s?
Dendrites are finger-like cells at the end of neurons that collect signals from other cells to send back to the soma.
What part of the neuron is known as the transmission cable which is responsible for carrying messages to other neurons, muscles, and glands?
AXON
What type of tissues are well-vascularized and are able to contract and move?
MUSCLE TISSUE
What are the 3 types of Muscle Tissue?
- Skeletal Muscle Tissue
- Cardiac Muscle Tissue
- Smooth Muscle Tissue
What are SKELETAL muscle tissue?
- long parallel cells
- multinucleated (multiple cells)
- has striations
- VOLUNTARY movement
- attached to bones
- pull on bones & skin to make movements
What are CARDIAC muscle tissues?
- branch-like cell structure
- uninucleated (one nucleus per cell)
- has striations
- INVOLUNTARY movement
- has intercalated disks = holds muscle cells during contraction
- cells divide and converge
What are SMOOTH muscle tissues?
- short & tapered cells
- uninucleated (one nucleus per cell)
- NO striations
- INVOLUNTARY movement
- lines walls of some blood vessels and hollow organs
- form tight-knit sheets
What are the differences between the skeletal, cardiac, and smooth muscle tissues in terms of striations, # of nucleus, movement, and cell shape?
of NUCLEUS
STRIATIONS
1. Skeletal = YES
2. Cardiac = YES
3. Smooth = NO
- Skeletal = MULTIPLE
- Cardiac = ONE
- Smooth = ONE
MOVEMENT
1. Skeletal = VOLUNTARY
2. Cardiac = INVOLUNTARY
3. Smooth = INVOLUNTARY
CELL SHAPE
1. Skeletal = LONG, PARALLEL
2. Cardiac = BRANCH-LIKE
3. Smooth = SHORT, TAPERED
What type of tissue lines, covers, and organizes the body?
EPITHELIAL TISSUE
What are the 2 types of Epithelial Tissues?
PROPER and GLANDULAR EPITHELIUM
What is the difference between proper/primary epithelium and glandular epithelium?
Proper/Primary Epithelium
- cover and lines outer and inner body
Glandular Epithelium
- forms glands and secrete hormones and other substances
TRUE or FALSE:
All epithelial tissues are AVASCULAR = NO blood supply
TRUE
Epithelial tissue rely on what type of tissues for what they need, such as blood supply?
CONNECTIVE TISSUE
What are the 2 basis of classifying epithelial tissue?
SHAPE and LAYERING
Enumerate and define the 3 types of epithelial tissues according to SHAPE.
- Squamous
- flat cells
- fast absorption & diffusion - Cuboidal
- cube-shaped cells
- absorption & production of secretions - Columnar
- tall, rectangular cells
- absorption & production of secretions
Enumerate and define the 3 types of epithelial tissues according to LAYERING.
- Simple Epithelium
- 1 layer of cells - Stratified Epithelium
- multiple layers of cells - Pseudostratified Epithelium
- ONLY 1 layer but looks like it has multiple
Define SIMPLE SQUAMOUS Epithelium.
- 1 layer of flat cells
- lines blood vessels, air sacs, etc.