Organ systems are composed of two or more different organs that work together to provide a common function. There are 10 major organ systems in the human body. Skeletal System: provides support for the body, to protect delicate internal organs and to provide attachment sites for the organs. It is made up of - bones
- artilage
- tendons and
- ligaments.
Muscular System: provides movement. Muscles work in pairs to move limbs and provide the organism with mobility. Muscles also control the movement of materials through some organs, such as the stomach and intestine, and the heart and circulatory system. It is made up of - skeletal muscles and
- smooth muscles.
Circulatory System: transports nutrients, gases (such as oxygen and CO2), hormones and wastes through the body. It is made up of - heart
- blood vessels and
- blood
Nervous System: relays electrical signals through the body. The nervous system directs behaviour and movement and, along with the endocrine system, controls physiological processes such as digestion, circulation, etc. It is made up of - brain
- spinal cord and
- peripheral nerves.
Respiratory System: provides gas exchange between the blood and the environment. Primarily, oxygen is absorbed from the atmosphere into the body and carbon dioxide is expelled from the body. It is made up of Digestive System: breaks down and absorbs nutrients that are necessary for growth and maintenance. It is made up of - mouth
- esophagus
- stomach
- small intestine
- large intestine
Excretory System: filters out cellular wastes, toxins and excess water or nutrients from the circulatory system. It is made up of - kidneys
- ureters
- bladder and
- urethra
Endocrine System: relays chemical messages through the body. In conjunction with the nervous system, these chemical messages help control physiological processes such as nutrient absorption, growth, etc. It is made up of - hypothalamus
- pituitary
- thyroid
- pancreas and
- adrenal glands.
Reproductive System: - Female reproductive system manufactures eggs and provides food for babies. It is made up of
- ovaries
- oviducts
- uterus
- vagina and
- mammary glands.
Male reproductive system manufactures sperm to inseminate eggs. It is made up of - testes
- seminal vesicles and
- penis.
Lymphatic/Immune System: destroys and removes invading microbes and viruses from the body. The lymphatic system also removes fat and excess fluids from the blood. It is made up of - lymph
- lymph nodes and vessels
- white blood cells
- T-cells and
- B-cells.
|