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Connective tissue/ Muscle tissue (SUPPORTING CONNECTIVE TISSUE (amorphous…
Connective tissue/ Muscle tissue
Mast Cells- Secrete heparin to prevent excessive blood clotting and histamine to promote inflammation.
Categories of connective tissues
LOOSE:
AREOLAR
Gel like matrix with fibroblast, macrophages, mast cells and collagen and elastic fibers.
LOCATION: BENEATH EPITHELIUM , COVERING VENTRAL ORGANS
FUNCTIONS : DIFFUSION OF NUTRIENTS AND GASES; WRAPS AND CUSHIONS ORGANS
ADIPOSE :
LOCATION: UNDER SKIN (UNDER DERMIS) AROUND KIDNEYS , EYEBALLS AND BREAST.
FUNCTIONS:ENERGY STORE INSULATION AND PROTECTIONS
Closely packed adipoctes (fat cells) with nuclei pushed to one side within matrix.
RETICULAR
LOCATIONS: BASEMENT MEMBRANE AND LYMPHATIC ORGANS ( Lymph nodes thymus, spleen)
FUNCTION: support
Dense Regular:
LOCATION: TENDONS, LIGAMENTS
Primary collagen fibers with few fibroblast ( only see nuclei) POOR BLOOD SUPPLY = LITTLE TO NO HEALING
FUNCTION: ATTACHMENT TENSILE STRENGTH
DENSE IRREGULAR
RANDOMLY ARRANGED COLLAGEN FIBERS
LOCATION: DERMIS OF SKIN, HEART VALVES
PROVIDES TENSILE STRENGTH
ELASTIC
PRIMARY ELASTIN FIBERS
LOCATION: LUNG TISSUE , WALL OF AORTA
DURABILITY AND STRETCH
Elastic
Provides rubbery resiliency to matrix
Location: SKIN, LUNGS,BLOOD VESSELS
Collagen
composed of protein called collagen
provides high tensile strength to matrix
Reticular
Forms delicate networks
Found in the basement membrane
FLUID CONNECTIVE TISSUE
BLOOD
Red cells, white cells and platlets mixed with plasma
LOCATION: Within heart and blood vessel
FUNCTION: Transport of gases, nutrients, waste
LYMPH: T cells, B cells, and NK cells
LOCATION: lymphatic system
FUNCTION: Immunity and return fluid to cardiovascular system
SUPPORTING CONNECTIVE TISSUE
amorphous ( chondroition and glucosamine) amtrix that
surrounds cells= chondrocytes ( within lacunae) -
HYALINE
LOCATION: embryonic skeleton, costal cartilages, cartilage of the nose, trachea, and larynx
FUNCTION: support AVASCULAR: no healing
ELASTIC
Same as above plus elastic fibers
LOCATIONS: external epiglottis
FUNCTION: maintenance of shape plus flexibility x
FIBROCARTILAGE
Less than above
LOCATION: intervertebral disc, pubic symphysis
FUNCTION: Tensile strength plus shock absorber
BONE
OSTEOCYTES
LOCATION : Bones of skeleton
FUNCTION: Protection, support, movement, calcium store and hematopoiesis; HIGHLY VASCULAR: fast healing
COMPACT CIRCLES
MUSCLE TISSUE
CARDIAC- Network of cells with one centrally located nucleus INTERCALATED DISC ( two cells meet) STRIATION LOCATION - heart FUNCTION- to pump blood from the heart to the lungs and from the heart to the body CONTROL- INVOLUNTARY
SMOOTH- Spindle- shaped cells with one centrally located nucleus LOCATION- walls of hollow visceral, walls of blood vessels attached to hair follicles in dermis FUNCTION movement of food through digestive tract CONTROL- involuntary