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TYPES OF HUMAN TISSUES Four Basic Kinds of Tissues • Epithelial Tissue • Connective Tissue • Muscle Tissue • Nervous Tissue Muscle Tissue • Muscle Tissue: – Associated with the bones of the skeleton, the heart and in the walls of the hollow organs of the body. • Muscle Tissue Functions: – – – – – – – Movement Locomotion Maintains posture Produces heat Facial expressions Pumps blood Peristalsis FUNCTIONS OF MUSCLES • SKELETAL: VOLUNTARY: SUPPORTS SKELETAL SYSTEM, MOVEMENT: STRIATED: TIRES EASILY • SMOOTH: INVOLUNTARY: LINES MANY INTERNAL ORGANS: NO STRIATIONS; NEVER TIRES • CARDIAC: INVOLUNTARY: COMBINATION OF SKELETAL AND SMOOTH: FOUND ONLY IN THE HEART: NEVER TIRES NERVE TISSUE Nervous Tissue • Nervous Tissue: – Main component of the nervous system, ie., brain, spinal cord & nerves. • Nervous Tissue Functions: – Regulates & controls body functions – Generates & transmits nerve impulses – Supports, insulates and protects impulse generating neurons. Connective Tissue • Connective Tissue: – Most abundant & widely distributed tissue • Connective Tissue Functions: – Connects, binds and supports structures, • Tendons, ligaments, etc. – Protects & cushions organs and tissues, – Insulates (fat) and – Transports substances (blood). Types of Connective Tissue • • • • • • Bone Ligaments Tendons Cartilage Fat Blood TYPES OF CONNECTIVE TISSUE LIGAMENT: CONNECTS BONE TO BONE: CONNECTIVE TISSUE TENDON: CONNECTS MUSCLE TO BONE: CONNECTIVE TISSUE BLOOD: CONNECTIVE TISSUE: PRODUCED IN THE BONES: TRANSPORTS NECESSARY NUTRIENTS, REMOVES TOXINS FROM BODY, REGULATES BODY FLUID ELECTROLYTES, CARRIES OXYGEN, AND CONTROLS pH: CONNECTIVE TISSUE CONNECTIVE TISSUE: FAT CELLS: CUSHION, INSULATION, ENERGY STORAGE CARTILAGE: MORE FLEXIBLE THAN BONE: GIVES SUPPORT: NOSE, EARS, ENDS OF JOINTS: SOME CARTILAGE TURNS INTO BONE, SOME DOESN’T Epithelial Tissue • Epithelial Tissue Locations: – Covers the body – Lines the cavities, tubes, ducts and blood vessels inside the body – Covers the organs inside body cavities • Epithelial Tissue Functions: – – – – – Protection from physical & chemical injury, Protection against microbial invasion, Contains receptors which respond to stimuli, Filters, secretes & reabsorbs materials and Secretes serous fluids to lubricate structures.