What is the three types of papillae?
What is the three types of papillae?
The three types of papillae are:
- fungiform (mushroom like)
- filiform (filum - thread like)
- circumvallate
Filiform papillae are the most common. They are keratinised and in the living, they look white.
Fungiform papillae are not keratinised, but are highly vascularised. In the living, they look red. most of the fungiform papillae have some taste buds.
Underneath the papillae, there are mucous and serous glands, pockets of adipose tissue, and a layer of skeletal muscle and connective tissue. The skeletal muscle is arranged in three different planes, which allows the tongue to perform a number of complex movements.
Circumvallate papillae Now have a look at this section, a vertical section of tongue taken just anterior to the sulcus, that shows part of a circumvallate papilla . See if you can identify Von Ebner's glands, the cleft of the circumvallate papilla, the taste buds, and the muscle layer.
The papillae in this region are very large, notice the scale bar.
These papillae have taste buds in the medial walls of the cleft. These papillae are larger than the other two types of papillae. Glands, called Von-Ebner's glands (serous glands) open into the cleft.
Taste buds contain epithelially derived taste receptor cells, sustentacular cells that surround a small central cavity tat opens onto the surface as a tiny taste pore. Basal cells renew both of these types of cell. Chemicals stimulate the receptors, and initiate impulses in the afferent nerve fibres.
The three types of papillae are:
- fungiform (mushroom like)
- filiform (filum - thread like)
- circumvallate
Filiform papillae are the most common. They are keratinised and in the living, they look white.
Fungiform papillae are not keratinised, but are highly vascularised. In the living, they look red. most of the fungiform papillae have some taste buds.
Underneath the papillae, there are mucous and serous glands, pockets of adipose tissue, and a layer of skeletal muscle and connective tissue. The skeletal muscle is arranged in three different planes, which allows the tongue to perform a number of complex movements.
Circumvallate papillaeNow have a look at this section, a vertical section of tongue taken just anterior to the sulcus, that shows part of a circumvallate papilla . See if you can identify Von Ebner's glands, the cleft of the circumvallate papilla, the taste buds, and the muscle layer.
The papillae in this region are very large, notice the scale bar.
These papillae have taste buds in the medial walls of the cleft. These papillae are larger than the other two types of papillae. Glands, called Von-Ebner's glands (serous glands) open into the cleft.
Taste buds contain epithelially derived taste receptor cells, sustentacular cells that surround a small central cavity tat opens onto the surface as a tiny taste pore. Basal cells renew both of these types of cell. Chemicals stimulate the receptors, and initiate impulses in the afferent nerve fibres.
