Describe the gross structure and functions of the main body systems. P3
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Describe the gross structure and functions of the main body systems. P3 Introduction I will try describing the gross structure and also the functions of the 10 systems in our body. A system is made up of different tissues and organs working together to perform a specific function in the body. Cardiovascular System The cardiovascular system comprises the heart and blood vessels that circulate blood throughout the body, bringing oxygen and nutrients to muscles and organs and then returning it to the heart to be pumped again. The cardiovascular system includes: * The heart: the pumping organ * Blood vessels : a closed circuit of tubes * Arteries : carry blood to all parts of the body * Capillaries : carry blood from arteries to veins * Veins : carry blood back to the heart * Blood : consisting of liquid plasma and various blood cells Position of the heart The heart is a muscle about the size of
The brain use information it receives from your nerves to coordinate all of your actions and reactions. The nervous system includes: * Brain * Spinal Cord * Nerves/neutrons Endocrine system the glands of the endocrine system and the hormones they release influence almost every cell, organ, and function of our bodies. The endocrine system is instrumental in regulating mood, growth and development, tissue function, and metabolism, as well as sexual function and reproductive processes. The major glands that make up the human endocrine system include the: parathyroid's (controls amount of calcium in blood), adrenal glands (controls emergency action), pineal (controls wake and sleep patterns), reproductive glands (which include the ovaries and testes), hypothalamus (stimulates pituitary, controls water balance), pituitary gland (stimulates other glands), thyroid (control heat and energy production), pancreas (controls blood sugar), thymus (helps fight infection). Digestive system The primary function of the digestive system is to break down the food we eat into smaller parts so the body can use them to build and nourish cells and provide energy.
The amount of water in the body must be balanced against the amount of water which we drink and the amount we lose in urine and sweat. The renal system includes kidneys, ureters, bladder and uretra. Reproductive system The primary role of the reproductive system - whether male or female - is to create a new generation and further propagate human life. The male reproductive system is required to produce and supply the sperm to fertilize the egg. The sperm and egg contain the genetic material of the parents. The female reproductive system is the organ system in girls and women responsible for maintaining the reproductive cycle. The organs and tissues in the system have specific roles, such as producing eggs (ovaries) and carrying a developing fetus (uterus). The female structure of reproductive system include: ovaries, fallopian tubes, uterus, cervix, and vagina. The male structure include: testes and penis. Musculoskeletal system Lymphatic system Immune system Conclusion ?? ?? ?? ?? Anita Celmer Unit 5 16/03/2009 BTEC National Diploma in Health and Social Care Samantha Harman 1
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