THE ENDOCRINE SYSTEM

Chapter 11-Tristana Cardona

THE ENDOCRINE SYSTEM-OVERVIEW

The endocrine system is a collection of glands which secrete hormones. Those hormones are directly secreted into the bloodstream.

This system maintains the body homeostasis, which is very important for our survival.

The endocrine system consist of : two adrenal glands, two ovaries, four parathyroid gland, the pancreas, the pineal gland, two testes, the thymus gland, and the thyroid gland.

In this presentation we will study two suffixes:-crine and -tropin.

THE SUFFIX -CRINE

The suffix –crine is used in reference to “to secrete”.

We see this in the title itself : the endoCRINE system, the system which secrete hormones into the bloodstream.

The endocrine system, -crine: to secrete

THE SUFFIX -TROPIN

The suffix –tropin is used to refer to something that stimulates.

This is commonly seen with hormones, when they are associated with a “stimulating effect”

In the next two slides we will see how somatotropin and gonadotropins hormones work and who it is said that they have a stimulating effect.

SOMATOTROPIN

Somatotropin is a growth hormone (GH) which stimulates cells to rapidly increase in size and divide.

It is secreted by the anterior pituitary gland and is crucial for our proper development and growth.

Dwarfism is a condition of being abnormally short in height. Although it may be hereditary, it could be from the lack of growth hormone.

Gigantism is a condition of excessive development of the body due to overproduction of growth hormones.

GONADOTROPIN

FSH ( follicle-stimulating hormones) and LH (luteinizing hormones) both exert influences on male and female gonads. They are called gonadotropins hormones because of their stimulating effect.

FSH is responsible for the developpment of ova and sperm. However, it also stimulates the ovary to secrete estrogen.

LH stimulates the secretion of sex hormones in both males and females. It also plays a role in releasing the ova in females.