muscles that compose the abdominal wall

These are not under the direct control of one's will. Hence called as Involuntary muscles and are innervated by autonomic nervous system. These muscles are composed of stender, tapering muscle fibres which are non-striated. These are found in the wall..

Cardiac muscle Cardiac muscles are extensively present in the heart. They show characteristics of both striated and unstriated muscles. They are composed of non-tapering cells with faint cross striations. Each cell contains one or two nuclei. The cell..

Striated muscle fibres These are striped muscles and are voluntary since their contraction is under the control of the will. The entire muscle fibre shows alternate dark and light patches. They are long cylindrical unbranched cells, with a number of nuclei, which a..

From the oesphagus to rectum, the gut wall is mainly composed of two region..

It is the outer tough covering around the cell, which provides specific shape and protection to the bacterium. It prevents the cell from swelling and bursting due to osmotic changes. It is composed of a polysaccharide called murein or peptidoglycan. It consists of polysaccharide cross lin..

When a typical skeletal muscle is viewed under a microscope, it consists of many elongated, cylindrical cells called muscle fibres or muscle cells. Each muscle fibre is enveloped by a plasma membrane called the sarcolemma. The sarcolemma surrounds a quantity..

The cellwall of prokaryotes like bacteria is composed of peptidoglycans. Apart from maintaining the shape and size of plant cells, the cell wall is involved in some specific functions such as Protection against the attack of pathogens Providing mechanical support Allowing moveme..

The kidneys are dark-red, slightly flattened, bean shaped organs about 10 cm long, 5 cm wide and 4 cm thick each weighing about 27 gms. They are placed against the back wall of the abdominal cavity just below the diaphragm, one on either side of the vertebral column, between th..

The inner intercostal muscles contract bringing the ribs back to the original position and the diaphragm is also raised back by the action of the abdominal muscles. This reduces the space in the chest cavity and increases the pressure. This expels the air out of the l..