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- Present Simple, Present Continuous (Progressive) Future Simple Active;
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I. 4 5 (15 ).
II. . -6 (45 .)
1. :
approximately
weight ;
tissue
identify ; ,
smooth
striated
contract
change
expand (), (); () ,
respond
certain ; ()
in response
involuntary
bound
bundle
tendon
environment
voluntary
will ; ;
feature ,
complete
contraction
nerve fibre
motor fiber
2. .
Types of Muscles
The muscles constitute approximately 50 per cent of the total body weight. There are three main types of muscular tissue that we identify and classify on the basis of structure and functions:
1) smooth or visceral muscle,
2) striated or skeletal muscle,
3) cardiac muscle.
Smooth muscles can contract slowly. They make up the walls of the internal organs. The visceral muscles react slowly to changes within the body. They are contracting or expanding when they respond to certain chemicals in the blood or in response to the effect of temperature but we cannot make them move. For this reason, we call them involuntary muscles. Smooth muscle tissue consists of long cells. Smooth muscle fibres are bound into bundles by connective tissue.
Striated muscle tissue consists of large fibres in the form of bundles. There are tendons at their ends by means of which they are bound to bones. Striated muscles are most necessary for manipulation of the bones of the skeleton. They react quickly to changes in the environment and become active through an effort of will. Striated muscle is richer in blood vessels than the smooth muscle. For this reason, we call striated muscles voluntary muscles.
A characteristic feature of cardiac muscle is that fibres have neither a beginning nor an end. Cardiac muscle is under complete involuntary control.
Muscles are the active part of the motor apparatus: their contractions are producing various movements, when they are active. Muscles have both motor and sensory nerve fibres. Impulses (signals) about the state of the muscle reach the brain along the sensory fibres. The nerve impulses which cause the muscle to contract come from the brain along the motor fibres.
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3. :
1) muscle, muscular, musculature, musculation;
2) to contract, contracted, contracting, contractile, contraction;
3) to vary, variant, various, variable, variation, variety;
4) to connect, connecting, connection, connective;
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5. , :
1. Smooth muscle tissue of long cells.
2. Muscles have both motor and nerve fibres.
3. We call striated muscles .
4. There are three of muscular tissue
5. The visceral muscles slowly to changes within the body.
6. Smooth muscle fibres into bundles by connective tissue.
7. Muscles are the active part of .
8. Cardiac muscle is under involuntary....
9. Smooth muscles can slowly.
10. Striated muscle is richer in blood vessels than .
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the smooth muscle, react, consists, contract, the motor apparatus, are bound, voluntary muscles, sensory, main types, control.
5. :
| 1. cardiac muscle | A. is a form of striated muscle tissue which is under the voluntary control of the somatic nervous system. |
| 2. fibre | B. to recognize or establish as being a particular person or thing. |
| 3. muscle | C. is a cellular organizational level intermediate between cells and a complete organ. |
| 4. skeletal muscle | D. is involuntary striated muscle that is found in the walls and histological foundation of the heart, specifically the myocardium. |
| 5. visceral muscle | E. is a soft tissue found in most animals. |
| 6.to identify | F. is a natural or synthetic string used as a component of composite materials. |
| 7. tissue | G. is tissue associated with the internal organs of the body, especially those in the abdominal cavity. |
