2 A/ THE HUMAN BODY
The human body functions as a whole, but it is composed of many separate functional units that must work together. The smallest and most basic unit of life is called the cell. All the cells have three functions: reproduction, movement of fluid through the cell membrane and metabolism. Groups of similar cells form tissues.
A body system consists of a group of organs that form different systems: the musculoskeletal system, the circulatory system, the digestive system, the respiratory system, the urinary system, the nervous system, the endocrine system, the reproductive system and the integumentary system. Organs of the body are positioned within spaces called cavities.
The human body itself consists of three major areas: the head, the trunk and the extremities. The upper limb is made up of the shoulder, upper arm, elbow, forearm, wrist and the hand with a thumb and four fingers. The lower limb is composed of the pelvic girdle, the hip, thigh, knee, lower leg with the calf and the shin, the ankle and the foot with five toes.
The skeleton of an adult consists of more than 200 bones of various shapes and sizes. They are described as long, short, flat and irregular. The point where two or more bones meet is a joint.
What are the three functions of the cell?
Name some of the body systems.
Which are the main parts of human body?
How can we classfy the bones according to the shape?
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