Bio.
Terms
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- Tissue
- A cooperative unit of many similar cells that perform a specific function within a multicellular organisms.
- The hierarchy of structural organization in an animal
- (1) Cellular level [muscle cell] (2) Tissue level [muscle tissue] (3) Organ level [heart] (4) Organ system level [cardiovascular system] (5)Organism level [consisting of many organ systems]
- Epithelial Tissue
- -Cells are packed tight together, cells have free apical surface, and bottom surface of basement membrane. -Functions as protection, secretion, absorption, and filtration. -Found in body coverings, body linings, and glandular tissue.
- Simple Squamos (epithelial tissue)
- -Forms membranes. -Lines body cavities, lungs, and capillaries. -Single layer of flat cells.
- Simple Cuboidal (Epithelial tissue)
- -Single layer of cube-like cells. -Forms walls of kidney tubules. -Covers ovaries.
- Simple columnar (Epithelial tissue)
- -Single layer of tall cells, often includes goblet cells; which produce mucus. -lines digestive tract. -Primary function will be secretion and absorption.
- Stratified Squamos (Epithelial tissue)
- -Cells at the free edge are flattened. -Protective covering where friction is common. -Found in skin, mouth, and esophagus.
- Connective tissue
- -All have extracellular matrix. -Binds tissue together, supports, and protects. -Most abundant and widely distributed.
- Bone (Connective tissue)
- -Hard matrix of calcium salts, a lot of collagen fibers. -Protect and support body. -lacunae (cavities)
- Cartilage (connective tissue)
- HYALINE: -lots of collagen fibers, rubbery matrix. -fetal skeleton and ribs. ELASTIC: -Provides elasticity. -Found in external ear, epiglottis, and trachea. FIBROCARTILAGE: -Lots of collagen fibers. -Forms cushion-like discs between vertebrae. -spinal cord
- Loose (connective tissue)
- -Contains all fiber types. -Soaks up excess fluid. -widely distributed.
- Fibrous (connective tissue)
- -main matrix element is collagen fibers. -Tendons (muscle to bone), ligaments (bone to bone)
- Adipose (Connective tissue)
- -many contain large lipid deposits. -insulates body, protects organs, and fuel storage. -Found directly below the skin and surrounds internal organs.
- Blood (Connective tissue)
- -Surrounded by fluid matrix. -transport vehicle for materials. -Found throughout entire body.
- Muscle Tissue
- -Produces movement.
- skeletal muscle (muscle tissue)
- -Lots of cylindrical muscle fibers. -Attached to the skeleton. -Brings about the movement of the various bones of the skeleton
- Nervous Tissue
- -Neuron and nerve support cells. -Send impulses to other areas of the body. -IRRITABILITY = able to respond to stimuli. -CONDUCTIVITY = conducts messages.
- Cardiac muscle (muscle tissue)
- -Found in the heart ONLY.
- Smooth muscle (Muscle tissue)
- -found in the walls of all the hollow organs of the body (except the heart). -regulates the flow of blood in the arteries, regulates the flow of air through the lungs, and expels urine from your urinary bladder. -Made up of thin-elongated muscle cells.