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body systems

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P3 Body system Cardiovascular system The cardiovascular system is composed of the heart, blood vessels, or vasculature, and the cells and plasma that make up the blood. The blood vessels of the body represent a closed delivery system, which functions to transport blood around the body, circulating substances such as oxygen, carbon dioxide, nutrients, hormones and waste products. There are three main types of blood vessel:- � Veins - the efferent blood vessels that return blood to the heart. � Arteries - the afferent blood vessels that carry blood away from the heart. � Capillaries - narrow, thin-walled blood vessels that form networks within the tissues. Digestive system The digestive system is made up of the digestive tract a series of hollow organs joined in a long, twisting tube from the mouth to the anus and other organs that help the body break down and absorb food. Organs that make up the digestive tract are the mouth, oesophagus, stomach, small intestine, large intestine also called the colon rectum, and anus. Inside these hollow organs is a lining called the mucosa. In the mouth, stomach, and small intestine, the mucosa contains tiny glands that produce juices to help digest food. How digestive system works throughput the body Mouth:-Food enters the body via the mouth where it is chewed. ...read more.


As a result the stools become drier and harder in the lower end of the colon and rectum and are therefore more difficult to pass out of the body. Rectum This is essentially a storage reservoir at the end of the large intestine and adjacent to the anus for accumulating the faeces prior to elimination from the body. Anus The opening at the end of the digestive tract which allows waste matter to pass through into the outside world. Endocrine system The endocrine system is an integrated system of small organs that involve the release of extracellular signaling molecules known as hormones. The endocrine system is instrumental in regulating metabolism, growth, development and puberty, tissue function, and also plays a part in determining mood. The Structure of the Endocrine system The endocrine system is made up with a series of glands located around the body. These glands include: * Pituitary Gland * Thyroid Glands * Parathyroid Glands * Thymus * Pancreas * Adrenal Glands * Gonads Each of these glands produces hormones, which have a particular function in the body. Excretory system The excretory system is a system that connects to the digestive system. It starts at the mouth and continues down the esophagus, after that it travels down to the large chamber of the liver and stomach. ...read more.


-The cardiac muscle: - The cardiac muscle is found only in the heart and it is striated like the skeletal muscle. Nervous system The nervous system of the human being is responsible for sending, receiving, and processing nerve impulses throughout the body. All the organs and muscles inside your body rely upon these nerve impulses to function. It could be considered as the master control unit inside your body. Sense organs provide the nervous system with information about the environment by means of such senses as sight, hearing, smell, taste, tough, pressure, and pain. Nerves are connected throughout the whole body to the brain. They carry the information throughout the body in the form of electrochemical signals called impulses. These impulses travel from the brain and spinal cord to the nerves located throughout the body. The nervous system is divided into two main systems, the central nervous system (CNS) and the peripheral nervous system. The reproductive system The reproductive system is a system which is divided into two, the male reproductive system and the female reproductive system. The male and the female reproductive system have similar functions to how they work. The female reproductive system consists of the vagina, uterus, accessory glands, ovaries, fallopian tubes, whereas the male reproductive system consists of seminal vessels, the bulbourathral glands, excretory ducts, ejaculatory ducts and pair of testes. ?? ?? ?? ?? Talent Twala 12pb 1 ...read more.

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