What Is An Organ System Made Of

What is an organ system made of

Main article: Nervous system The nervous system consists of the body's neurons and glial cells, which together form the nervesganglia and gray matter which in turn form the brain and related structures. The brain is the organ of thoughtemotion, memoryand sensory processing ; it serves many aspects of communication and controls various systems and functions. The special senses consist of sourcehearingtasteand smell.

The eyesearstongueand nose gather information about the body's environment. The CNS is mostly responsible for organizing motionprocessing sensory informationthought, memory, cognition and other such functions. The SNS is involved in voluntary functions like speaking and sensory processes. The ANS is involved in involuntary processes, such as digestion and regulating blood pressure. In epilepsyabnormal electrical activity in the brain can cause seizures.

In multiple sclerosisthe immune system attacks the nerve liningsdamaging the nerves' ability to transmit signals.

Amyotrophic lateral sclerosis ALSalso known as Lou Gehrig 's disease, is a motor neuron disease which gradually reduces movement in patients. There are juice the movie online many other diseases of the nervous system. It is composed of the gonads testes and ovaries which produce eggs and sperm cells gametes and produce hormones necessary for proper sexual development. The rest of the glands and ducts of the reproductive system are responsible for the transportation and sustaining of the gametes and to nurture the offspring.

Male puberty generally occurs between the ages of and is characterized by beginning of sperm production and the development of secondary sex characteristics such as increased height and weight, broadened shoulders, pubic and facial hairvoice deepening and muscle development. Female puberty generally occurs between the ages of and is characterized by ovulation and menstruation.

The growth of secondary sex characteristics such as growth of pubic and underarm hairbreastuterine and vaginal growth, widening hips and increased height and weight also occur during the female puberty process. The penis consists of the glans which is what is an organ system made of head of the penis and contains the urethra and urinary meatus the point where urine exits the penis, the rest of the penis is called the shaft or corpus cavernosum and contains most of the urethra. The glans is covered by a fold of skin called the foreskin though this can be removed through circumcision. They are then brought through the vas deferens which leads away from the testes to the seminal vesicles where the sperm cells are mixed with a fructose -rich fluid from the seminal vesicles allowing the sperm to stay alive and remain healthy.

It is then brought by the ejaculatory duct through the prostate and bulbourethral glandand mixed with fluids from said glands. The fluid from the prostate helps to neutralize the acidity of the vagina and keep the sperm alive.

This mixture of sperm and accessory gland fluids is called semen and is released through the urethra during ejaculation. Almost the entire internal male reproductive system works in pairs with two testestwo epididymistwo vas deferenstwo seminal vesiclestwo ejaculatory ductstwo bulbourethral glandsbut only one prostate and urethra. Located between the anus and vagina is the perineum. At birth a female has aboutoocytes the immature version of the egg cell in both ovaries combined, though this degenerates to aboutby the time puberty is reached.

The organ systems include

This is a lifetime supply as after birth no more oocytes are produced, compared to males where sperm cells are produced during their entire lifetime. During puberty the menstrual cycle begins for the first time, in response to low estrogen and progesterone levels the hypothalamus releases gonadotropin releasing hormone GnRH. This causes the anterior pituitary gland to release follicle-stimulating hormone FSH and luteinizing hormone LH. FSH stimulates ovarian follicles to juice the movie online and one dominant follicle will eventually take over.

As it continues to grow it releases more and more estradiol which stimulates LH secretion and suppresses FSH secretion preventing further follicular growth. When Custom dissertation services levels are highest the follicle ruptures releasing the ovum in a process called ovulation where it is then moved to one of the fallopian tubes.

After ovulation the portion of the follicle that remains in the ovary is transformed into corpus luteum which continues to produce estrogen and high levels of progesterone.

The progesterone causes the endometrium to grow thick preparing it for implantation of a fertilized egg. If fertilization occurs the corpus luteum continues to secrete hormones until the placenta develops enough to secrete the necessary hormones for maintaining pregnancy.

Eventually the corpus luteum will turn into corpus albicans which is essentially scar tissue. If fertilization fails the corpus luteum will degrade into corpus albicans and stop secreting enough progesterone and estrogen causing the endometrial lining to break resulting in menstruation. Symptoms include excess body hair, infertilityweight gainmale pattern baldness and irregular menstruation.]

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The lymphatic system Humeral system Integumentary system An organ is formed by a group of tissues. These tissues are, in turn, formed from a group of cells. A set of organs working together towards a common goal is classified as an organ system. For example, the digestive system is an organ system comprising organs like the stomach, esophagus, buccal-cavity, intestine, rectum, pancreas, liver, etc. These all organs are concerned with one important physiological function, namely digestion. If one of these organs is disturbed, then the whole digestive function is disturbed.