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Hormones of thyroid gland

  • Origin; it develops from the endoderm of the embryo.
  • Location; thyroid is the largest endocrinal gland, located anterior to the thyroid cartilage of the larynx in the neck. It is bilobed structure, the two lobes are connected by a narrow structure called isthmus. It is well supplied with blood vessels.
 Image of lobes of Thyroid

Image of Lobes of Thyroid

Showing lobes of thyroid in image

The microscopic structure; thyroid gland is made up of multiple follicles (acini). The follicles are lined by single laye…

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Hormones of Gonads

The gonads are the sex glands, ovaries in the female and testis in the males. They produce ova and sperms respectively but also secrete hormones.

Ovaries: are paired structures present in the females. They are located in the pelvic cavity in close proximity to the uterus and oviduct.

Hormones of ovaries are

  1. Oestrogens; are secreted by the cells of Graafian (ovarian) follicles. Estradiol is the principal feminizing hormone. It stimulates the development of female secondary sex cha…

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