The Nervous System

Consists of many cells called neurons they are supported by connective tissues neurology.

Neurons consist of a cell body and one axon and. Many dendrites. Theses are referred as nerve cells and axons bound together are called nerves.

Neurons need a consistent supply of oxygen and glucose neurons can synthesize chemical energy ATP only from glucose.

The nervous system are nerve impulses, or an action potential which are similar to tiny electric charges, neurons conduct nerve impulses.

The initial impulse is maintained through the length of neurons ,some neurons imitate nerve impulses while others relay stations where impulses are passed on redirected.

The functions of the nervous system sensory input sensory receptors external and internal stimuli sensations such as sight, vison, hearing, taste, smell, and touch, pain body temperature and temperature.

Integration of the brain and spinal cord are major organs for processing sensory input and initiating responses control of muscles and glands and the skeletal systems is stimulated by the nervous system the nervous system controls the secretion form many glands of the digestive system.

Homeostasis the nervous system can stimulate or in inhibit the activates of theses and other structure to help maintain hemostasis’s. mental activity in the brain is the center of mental activities including consciousness thinking, memory and emotions. 

Endocrine system works with the nervous system. It is responsible for mainating homeostasis is in an internal environment. It effects the body’s functions metabolism and our behaviors.

Glands excrete hormones straight into the blood system the circulation carries the hormones to target the response that’s sends a signal to the gland to continue hormone production.

The Edocirine system of glands each of which secreates a type of hormone directly into the blood stream to regulate thebody .

The endocrine system is in contrast to endocrine system which secretes its chemicals using ducts.

It derives from the Greek word’s endo meaning inside with in and crisis for secrete.

The endocrine systems effect is slow to initiate and prolonged in their response lasting for hours to weeks.

The nervous system sends information very quickly and the response are generally short lived, Hormones are substances, chemical mediators released from endocrine tissue into the blood steam where they travel to target tissue and generate a response.

Hormones regulate various human functions increasing metabolisms growth and development.

The endocrine system consists of glands widely separated from each other’s. The endocrine consists of groups of secretly cells surrounded by an extensive network of capillaries that are a diffusion of hormone chemical messengers from the secretory cells into the bloodstream to target tissues and organs that influences cellar growth and metabolism. 

The foundation of the endocrine systems are the hormones and glands as the body’s chemical messengers’ hormones transfer information and instructions form one set of cells to another many different hormones move through the blood stream, but each type of hormone is designed to affect only certain cells.

A gland is a group of cells release their secretions in secretions areas. for instance, exocrine glands such as sweat and salivary glands, release secretions in the skin or inside of the mouth.

Endocrine glands on the other hand release more than 20 major hormones directly into the blood stream where they transport class into other parts of the body.

In general, the endocrine systems are in charge body processes that happen slowly, such as cell growth. Faster process like breathing and body movements are controlled by the nervous system although even the nervous system and endocrine systems are separate systems. they often work together to help the body function properly.

Endocrine glands on the other hand release more than 20 major hormones directly into the blood stream where they transport class into other parts of the body.

In general, the endocrine systems are in charge body processes that happen slowly, such as cell growth. Faster process like breathing and body movements are controlled by the nervous system although even the nervous system and endocrine systems are separate systems. they often work together to help the body function properly.

The foundations of the endocrine systems are the hormones and glands as the body’s chemical messengers’ hormones transfer information and instructions from set of self to another many different hormones move through the blood stream, but each hormone is designed dot affect certain cells.

A gland is a group of cells that produces and secretes or gives of chemicals, A gland sects and removes materials from the blood, processes them and secretes the finished chemical products for use somewhere in the body.

Some types of glands release their secretion in specific areas, for instance exocrine glands such as sweat and salivary glands release secretions in the skin or inside the mouth, Endocrine glands on the other hand release more than 20 major hormones directly into the blood stream where they can be transported to cells in other parts of the body.

They hypothalamus is a collection of specialized cells that is located in the lower central part of the brain, is the main link between the endocrine and nervous system. Nerve cells in the hypothalamus control the pituitary gland by producing chemicals that either stimulate or suppress hormones secretions from the pituitary.

The production and secretion of pituitary hormones can be influenced bifactors such as emotions and changes in the season to accomplish this hypothalamus provides information’s sensed by the brain such as environmental temperature, light exposure pattens and feelings to the pituitary.

The anterior lobe regulates the activity of the thyroid, adrenals and reproductive glands, the anterior lobe produces hormones such as.

Growth hormones which stimulate the growth if bone and other body tissues and plays a role in the body’s handling nutrients minerals

Prolactin which activates milk production in women breast feeding

Thyrotropinwichi stimulates the adrenal gland to produces keratin hormones,

The pituitary also secretes endorphins chemicals that act on the nervous systems and reduce feelings of pain, the petrary secretes hormones which is signal they the reproductive organs create sex hormones. the petrary gland also conrtraols ovulations and menstrual cycle in women.

The posterior lobe of the pituitary release antidiuretic hormone which helps balance water in the body the posterior lobe produces oxytin which triggers the contractions the uterus in women while in childbirth.

Thyroid is located in the lower neck is shape liked a butterfly ad produces the thyroid hormone thyroxine and triodthyronie these hormones control the rate at which class burn fuels from the body to produce energy.

The production and release of the thyroid hormones is controlled by thyrotropin which is secreted by the pituitary gland. the neurothyroid hormones there is in the bloodstream the faster the chemical reaction occurs in the body. why are thyroids hormones so important because they help young bones grow and develop and they also play a role in brain development.

Parathyroids

Attached to the thyroids are for tiny glands that function together called parathyroids they release a parathyroids hormone which regulates the level of calcium in the blood with the help of calcitonin which is produced in the thyroid.