A&P Chapter 10 - Chapter 10: Zool 2013: Muscle Tissue...

Info iconThis preview shows pages 1–9. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 10: Zool 2013: Muscle Tissue Lecture Outline Dr. Navin Maswood Alternating contraction and relaxation of cells Chemical energy changed into mechanical energy Three types of Muscle Tissue: Smooth Muscle: non-striated & involuntary in action
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Functions of Muscle Tissue Producing body movements Stabilizing body positions Regulating organ volumes bands of smooth muscle called sphincters Movement of substances within the body blood, lymph, urine, air, food and fluids, sperm Generates heat (thermogenesis) involuntary contractions of skeletal muscle (shivering)
Background image of page 2
Properties of Muscle Tissue Excitability respond to chemicals released from nerve cells Conductivity ability to propagate electrical signals over membrane Contractility ability to shorten and generate force Extensibility ability to be stretched without damaging the tissue Elasticity ability to return to original shape after being stretched
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Skeletal muscle attaches to bone, skin or fascia Multinucleated striated with light & dark bands visible with scope Contraction is initiated by motor neurons and groups of cells work together as Motor Units
Background image of page 4
Connective Tissue Components of Skeletal Muscle Tissues (Figure 10.1) Superficial fascia = separates muscles from underlying the skin, composed or areolar & adipose CT, pathway for nerves, blood & lymphatic vessels Deep fascia = dense irregular connective tissue around muscle lines Connective tissue components of the muscle include epimysium = surrounds the whole muscle perimysium = surrounds bundles (fascicles) of 10-100 muscle cells endomysium = separates individual muscle cells All these connective tissue layers extend beyond the muscle fibersy to form the tendon
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Fig. 10.01
Background image of page 6
Nerve and Blood Supply Each skeletal muscle is supplied by a nerve, artery,two The neurons that stimulate skeletal muscles to contract are somatic motor neurons Each motor neuron supplies multiple muscle cells (neuromuscular junction) Each muscle cell is supplied by one motor neuron terminal branch and is in contact with one or two capillaries. nerve fibers & capillaries are found in the endomysium between individual cells
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Every mature muscle cell developed from 100 myoblasts that fuse together in the fetus. (multinucleated) Mature muscle cells can not divide Muscle growth is a result of cellular enlargement & not cell division Satellite cells retain the ability to regenerate new cells. Fusion of many Myoblasts
Background image of page 8
Image of page 9
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/14/2008 for the course ZOOL 2013 taught by Professor Maswood during the Spring '08 term at Texas Woman's University.

Page1 / 37

A&P Chapter 10 - Chapter 10: Zool 2013: Muscle Tissue...

This preview shows document pages 1 - 9. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online