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Muscle and nervous Tissue!

Muscle and nervous Tissue!. Muscle Tissues. Muscle tissue is like what part of an airplane? Contract in response to stimulus  muscle fibers shorten  move body parts Types: Skeletal Smooth Cardiac. Skeletal Muscle Tissue. Cells are long and threadlike

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Muscle and nervous Tissue!

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  1. Muscle and nervous Tissue!

  2. Muscle Tissues • Muscle tissue is like what part of an airplane? • Contract in response to stimulus  muscle fibers shorten  move body parts • Types: • Skeletal • Smooth • Cardiac

  3. Skeletal Muscle Tissue • Cells are long and threadlike • Cells have striations: alternating light and dark cross-markings • Each cell has many nuclei

  4. Skeletal (Cont’d) • Fun fact: 40% of the body is skeletal muscle • Where? Muscles that attach to bone and are moved by conscious, voluntary, effort • Functions: Muscles with skeletal tissue move head, trunk, limbs; facial expressions, write, talk, sing, beat Whitefield in the game tonight, etc…

  5. Smooth • Question: Is this tissue striated? • Smooth = no striations • Shorter than skeletal, spindle shaped, one central nucleus

  6. Smooth (Cont’d) • Fun fact: 10% of the body is smooth muscle • Where? Walls of hollow internal organs (stomach, intestine, bladder, uterus, blood vessels) • Functions: Movement of substance within the body (waste, blood, etc) Cannot be contracted consciously – involuntary • Ex of involuntary: smooth muscle moves food through digestive tract

  7. Cardiac • Cells are striated and branched  make complex networks, one nucleus • Can you control when your heart contracts or beats? Involuntary

  8. Cardiac (cont’d) • Where? Only in the heart • Function: pumps blood through the heart chambers and into blood vessels

  9. Nervous tissue • Nervous tissue is like what part of an airplane? • Cells are neurons • Support cells are neuroglial cells

  10. Nervous tissue (cont’d) • Where? Brain, spinal cord, nerves • FUNCTIONS- • NEURONS: • Sense changes in surroundings and transmit nerve impulses to other neurons, muscles, or glands • Coordinate, regulate, integrate body functions

  11. Nervous tissue (cont’d) 2. NEUROGLIAL CELLS: • Support and bind parts of nervous tissue • Supply nutrients to neurons (connect to blood vessels)

  12. Based on what you know of nervous and muscle tissue… • Complete this table in pairs:

  13. Recap • On a sheet of scrap paper: For each slide, write the type of muscle or nervous tissue and explain why.

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