* Our Facebook channel: 👇
/ 96omermajid96
* Our Telegram channel: 👇
t.me/humanbodyworld
* Our KZread channel: 👇
/ @humanbodyworld1387
* For inquiries about the scientific material provided by the channel, write to us on Telegram:
t.me/Mr0Amoory
In the last eight episodes, we ended the mechanisms through which the human body obtains the main elements for its survival, which are represented by oxygen, nutrients and fluids .. For the urinary system ... Today, we will begin by explaining the system responsible for regulating all the functions performed by the cells of our body from birth until death ... This device is the endocrine system, which is the second control of the body after the nervous system .. where both systems work To complete the work of the other, that is, they are complementary to each other ... as they collect information from all parts of the body and then compete to deal with this information ... and each has its own method ... For example, the nervous system uses electrical and chemical instructions in its work, which are very fast .. These instructions are transferred by nerve cells to specific cells and organs ... while the work of the endocrine system is slower and wider ... as it releases hormones into the bloodstream in order to spread widely. No, it is slower in terms of transmitting commands ... but it continues to affect the members for a longer period than the nervous instructions affect them ...
Our body contains three types of major glands, and each type of gland is branched by other glands subordinate to it, and it performs many of the main vital functions in the body.
Ductal gland: so named because it pours secretions into ducts outside the body cavity without passing through the blood. Examples include the lacrimal glands, the salivary glands.
Non-ductal endocrine glands: this type of gland pours secretions directly into the blood, as it does not have its own channels, but rather receives its secretions in the circulatory system, affecting the body in a functional and regulatory manner, and these secretions are called hormones, examples of which are: the pituitary gland and the thyroid gland .
🍂 The third type of glands is the mixed glands: this type combines the characteristics of the two previous glands, that is, the endocrine and deaf glands, as they have their own channels, but their secretions flow directly into the blood, examples of which are the pancreatic and sexual glands.
As for the endocrine glands, there are 9 in humans.
They are spread over the longitudinal axis of the body, in the head there are both the pineal gland, the pituitary gland, and the hypothalamus .. In the neck area are both the thyroid gland and the para thyroid gland .. then followed by the thymus in the chest .. And on both kidneys are the adrenal glands ... and near the stomach is the pancreas gland ... and finally there are gonads, which are found in the genitals ...
Now we can define endocrine glands as the structures that make and secrete hormones ...
As for hormones, they are chemical compounds that the endocrine glands manufacture and secrete into the blood to control the body’s performance and functions .. They regulate both metabolism, sex, growth, and immunity, as well as maintain homeostasis by balancing water and salts ratios in the blood ...
Hormones affect a certain type of cells..the target cells are called which contain special receptors for these hormones ... and one type of these hormones can affect many cells..also that there are cells that one type of hormones are not affected by ... The thyroid gland produces the hormone thyroxine, which is responsible for stimulating the metabolism in our body through its effect or its association with most cells of the body ... while the pituitary gland secretes the folical stimuliting hormone, which helps in the processes of growth and sexual maturity through its association with specific types Of cells in the ovaries and testicles ...
The work of the endocrine system begins with the pituitary gland, which is the main gland in the system, which is located under the brain ... and the pituitary gland consists of three lobes ... and they are both the front lobe, the posterior lobe and the middle lobe ... The role of the front and middle lobe is the secretion of glands from Hormones and they are both. The hormone that directs the adrenal cortex to regulate the adrenal gland and control its secretions ... and the hormone prolactin or the milk hormone, which stimulates the mammary gland to secrete milk during breastfeeding .. In addition to the growth hormone, which stimulates growth by stimulating cells to divide and regenerate. As well as thyroid stimulating hormone, or tsh, which stimulates the thyroid gland to produce thyroxine to stimulate the metabolism processes in the body ..