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Why doesn't the thymus have follicles?
The thymus does not have follicles because it is primarily involved in the maturation of T-cells rather than the production of antibodies, which is the main function of lymphoid follicles found in lymph nodes and the spleen. Instead of follicles, the thymus has a unique structure composed of epithelial cells, which provide a microenvironment for T-cell development and selection. The absence of follicles reflects the thymus's specialized role in the adaptive immune system, focusing on T-cell differentiation rather than B-cell activation and antibody production.
What kind of tissue is a human ovary?
A human ovary is primarily composed of ovarian tissue, which consists of ovarian follicles, stroma, and blood vessels. Ovarian follicles contain the oocytes (immature eggs) and support cells necessary for egg development and hormone production.
What is the histology of the thyroid gland?
The thyroid gland is composed of follicles lined by follicular cells that produce thyroid hormones (T3 and T4). These follicles are filled with colloid, which stores thyroid hormone precursor thyroglobulin. The gland also contains parafollicular cells (C cells) that produce calcitonin.
How is hair follicle similar to epidermal layer of skin?
Both hair follicles and the epidermal layer of skin are part of the integumentary system and are located in the skin. They are involved in providing protection to the body. Hair follicles contain stem cells that regenerate hair, while the epidermal layer forms a barrier against pathogens and UV radiation.
Thicker layer of skin composed of connective tissue?
The thicker layer of skin composed of connective tissue is the dermis. It contains collagen and elastin fibers, blood vessels, nerve endings, hair follicles, and glands. The dermis provides support and nourishment to the epidermis, the outermost layer of skin.
What is hair composed of?
Hair is composed of a protein called keratin, which is produced by hair follicles in the skin.
Is hair primarily composed of dead skin cells?
Yes, hair is primarily composed of a protein called keratin, which is produced by hair follicles in the skin. While hair itself is not alive, it is formed from living cells in the hair follicles.
Why doesn't the thymus have follicles?
The thymus does not have follicles because it is primarily involved in the maturation of T-cells rather than the production of antibodies, which is the main function of lymphoid follicles found in lymph nodes and the spleen. Instead of follicles, the thymus has a unique structure composed of epithelial cells, which provide a microenvironment for T-cell development and selection. The absence of follicles reflects the thymus's specialized role in the adaptive immune system, focusing on T-cell differentiation rather than B-cell activation and antibody production.
What kind of tissue is a human ovary?
A human ovary is primarily composed of ovarian tissue, which consists of ovarian follicles, stroma, and blood vessels. Ovarian follicles contain the oocytes (immature eggs) and support cells necessary for egg development and hormone production.
What is the histology of the thyroid gland?
The thyroid gland is composed of follicles lined by follicular cells that produce thyroid hormones (T3 and T4). These follicles are filled with colloid, which stores thyroid hormone precursor thyroglobulin. The gland also contains parafollicular cells (C cells) that produce calcitonin.
Are hair cells prokaryote or eukaryote?
Neither. They're composed of cells though, and given that prokaryotic cells are generally single-celled organisms like bacteria, do you think it's more likely that hair follicles are composed of prokaryotic or eukaryotic cells?
Sheath formed of both epithelial and connective tissues?
This structure is likely a dermal sheath, which is composed of both the epidermis (epithelial tissue) and the dermis (connective tissue). Dermal sheaths surround some hair follicles and play a role in supporting and nourishing the hair follicle.
Are hair follicle cells prokaryotic or eukaryotic?
Neither. They're composed of cells though, and given that prokaryotic cells are generally single-celled organisms like bacteria, do you think it's more likely that hair follicles are composed of prokaryotic or eukaryotic cells?
How long does alochol stay in hair follicles?
How long does alochol stay in hair follicles
Does the hypodermis give rise to hair follicles?
No, the dermis gives rise to hair follicles.
In which layer of the skin are hair follicles embedded?
Hair follicles are embedded in the dermis layer of the skin.
What are the primordial follicles stimulated to develop into primary follicles by the hormone called?
Primordial follicles are stimulated to develop into primary follicles by the hormone called follicle-stimulating hormone (FSH), which is released by the pituitary gland. FSH plays a crucial role in promoting the growth and maturation of ovarian follicles in the ovary.
