Skeletal System Flashcards
most abundant and widely distributed tissues
Connective tissue
binds together, supports, and strengthens
protects and insulates internal organs
compartmentalizes structures
CONNECTIVE TISSUE
major transport system (blood)
CONNECTIVE TISSUE
primary location of stored energy reserves
main source of immune responses
CONNECTIVE TISSUE
secrete fibers and ground substance
Fibroblasts
develop from monocytes and destroy bacteria and cell debris by phagocytosis
Macrophages
secrete antibodies neutralize foreign substances
Plasma cells (plasmocytes)
produce histamine
Mast cells
fat cells, stores triglycerides (fats)
Adipocytes
Neutrophils, eosinophils, lymphocytes, monocytes, and basophils
Leukocytes (White blood cells)
-between the cells and fibers
-fluid, semifluid, gelatinous, or calcified
-medium for exchange of substances between the blood and cells
GROUND SUBSTANCE
Contains water and glycosaminoglycans (GAGs)
GROUND SUBSTANCE
viscous, slippery substance that binds cells together, lubricates joints, and helps maintain the shape of the eyeballs
Hyaluronic acid
provides support and adhesiveness in cartilage, bone, skin, and blood vessels
Chondroitin sulfate
skin, tendons, blood vessels, and heart valves
Dermatan sulfate
bone, cartilage, and the cornea
Keratan sulfate
GROUND SUBSTANCE
Hyaluronic acid
Chondroitin sulfate
Dermatan sulfate
Keratan sulfate
FIBERS (3)
Collagen fibers
Elastic fibers
Reticular fibers
-Consist of collagen
-pulling or stretching, not stiff, allows tissue
flexibility
Collagen fibers
consists of elastin molecules surrounded fibrillin
Elastic fibers
have the ability to return to their original shape after being stretched
Elasticity
-much thinner than collagen fibers and form branching networks
-consists of collagen
Reticular fibers
CLASSIFICATION OF CONNECTIVE TISSUE
Embryonic connective tissue (2)
A. Mesenchyme
B. Mucous (mucoid) connective tissue
CLASSIFICATION OF CONNECTIVE TISSUE
Mature connective tissue
Connective tissue proper
Supporting connective tissue
Liquid connective tissue
CLASSIFICATION OF CONNECTIVE TISSUE
Mature connective tissue
Connective tissue proper
Supporting connective tissue
Liquid connective tissue
CLASSIFICATION OF CONNECTIVE TISSUE
Mature connective tissue
Connective tissue proper
Supporting connective tissue
Liquid connective tissue
Loose connective tissue (3)
a. Areolar connective tissue
b. Adipose tissue
c. Reticular connective tissue
Dense connective tissue
a. Dense regular connective tissue
b. Dense irregular connective tissue
c. Elastic connective tissue
Supporting connective tissue (2)
- Cartilage (Hyaline, fibro, elastic)
- Bone tissue (compact, spongy)
Liquid connective tissue (2)
- Blood
- Lymph
- present in the embryo
- GIVE RISE to most tissues, such as skin, blood or bone
Mesenchyme
- Wharton’s jelly
- found in the umbilical cord of the fetus
- contains fine collagen fibers
Mucous (mucoid) connective tissue
loosely arranged between cells
Loose connective tissue
most widely distributed connective tissues
packing material of the body
Areolar connective tissue
- storage of triglycerides
- reduces heat loss through skin
- energy reserve
- supports and protects
organs
Adipose tissue
- Stroma of liver, spleen, lymph nodes; red bone marrow
- reticular lamina of basement membrane
- around blood vessels and muscles
Reticular connective tissue
contains more fibers
thicker and more densely packed
Dense connective tissue
Forms tendons, most ligaments, and aponeuroses
Dense regular connective tissue
attach muscle to bone
tendons
attach bone to bone
most ligaments
sheetlike tendons that attach muscle to muscle or muscle to bone
aponeuroses
- irregularly arranged
- Fasciae, periosteum of bone, perichondrium of cartilage
- Provides tensile (pulling) strength in many directions
Dense irregular connective tissue
- contains elastic fibers with fibroblasts between them
- Allows stretching
-strong
-recoil to original shape after being stretched.
Elastic connective tissue
- contains a resilient gel
-appears bluish-white, shiny substance
-smooth surfaces for movement
-weakest
Hyaline cartilage
contains ground substance (chondroitin sulfate) and type II collagen
matrix
capsules containing chondrocyte
lacunae
produce and maintain ground substance
Chondrocyte
surrounds the surface of most cartilage
contains blood vessels and nerves
source of new cartilage cells (chondroblasts)
Perichondrium
- has chondrocytes in thick bundles of collagen fibers
- lacks perichondrium
- Support and joining structures together
- strongest type of cartilage (Strength and rigidity)
Fibrocartilage
fibrocartilage forms (4)
• Pubic symphysis (where hip bones join anteriorly)
• intervertebral discs
• menisci (cartilage pads) of knee
• portions of tendons that insert into cartilage
- has chondrocytes in threadlike network
- perichondrium present
- Provides strength and elasticity
- maintains shape of certain structures
Elastic cartilage
elastic cartilage forms 3
• Lid on top of larynx (epiglottis)
• part of external ear (auricle)
• auditory (eustachian) tubes
connective tissues in bones (4)
• bone or osseous tissue
• periosteum
• red and yellow bone marrow
• endosteum
a membrane that lines a space within bone that stores yellow bone marrow
endosteum
basic unit of compact bone
osteon or haversian system
-concentric rings consist of mineral salts (hardness)
-responsible for the compact nature of this type of bone tissue.
Lamellae
contains osteocytes
Lacunae
-networks of minute canals containing the processes of osteocytes
-provide routes for nutrients
Canaliculi
- trabecular or cancellous bone tissue
- does not contain osteons
- located in the interior of a bone, protected by compact bone
- light, which reduces the overall weight of a bone.
Spongy bone
- Lamellae that are arranged in an irregular pattern of thin columns
- support and protect the red bone marrow
Trabeculae
sites where red bone marrow is stored (5)
hip bones
ribs
sternum (breastbone)
vertebrae
proximal ends of the humerus and femur
blood cell production occurs in adults
hemopoiesis
has a liquid extracellular matrix called blood plasma and
formed elements
Blood
- extracellular fluid that flows in lymphatic vessels
- consists of several types of cells that is similar to blood plasma but with much less protein
Lymph
- extracellular fluid that flows in lymphatic vessels
- consists of several types of cells that is similar to blood plasma but with much less protein
Lymph
- extracellular fluid that flows in lymphatic vessels
- consists of several types of cells that is similar to blood plasma but with much less protein
Lymph