ICSE Class 9 Answered
physical education questions
Asked by ramandhillon1980 | 23 Jan, 2020, 07:08: PM
Expert Answer
1. Functions of the muscular system:
- Muscles allow a person to move, speak, and chew.
- They control heartbeat, breathing, and digestion.
- Functions such as temperature regulation and vision, also rely on the muscular system.
2. The collection of muscles and tendons in the shoulder is known as the rotator cuff. The rotator cuff consists of four muscles: supraspinatus, infraspinatus, subscapularis, and teres minor.
3. Types of muscles in the body:
1. Skeletal muscle
- Skeletal muscles are the only muscles which under voluntary control.
- They are attached to bones, and contracting the muscles causes movement of those bones.
2. Smooth muscle
- Smooth muscle acts involuntarily and cannot be consciously controlled.
- It lines the inside of blood vessels and organs, such as the stomach.
- It has an essential role in moving food along the digestive tract and maintaining blood circulation through the blood vessels.
3. Cardiac muscle
- Cardiac muscle is strong and acts involuntarily.
- It is located only in the heart, and pumps blood around the body.
- Cardiac muscle stimulates its own contractions that form our heartbeat.
Answered by Sheetal Kolte | 24 Jan, 2020, 11:31: AM
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