What are the layers of dermis?
The dermis has connective tissue, blood vessels, oil and sweat glands, nerves, hair follicles, and other structures. It is made up of a thin upper layer called the papillary dermis, and a thick lower layer called the reticular dermis. Anatomy of the skin, showing the epidermis, dermis, and subcutaneous tissue.
What is the layer underneath the retina?
The next layer beneath the sclera, between the retina and the sclera, is called the choroid. The choroid contains lots of blood vessels which provide oxygen and nutrients to the retina below. At the front of the eyeball the choroid connects with the ciliary body.
What is in the papillary layer of the dermis?
Papillary dermis. The papillary dermis is the uppermost layer of the dermis. It intertwines with the rete ridges of the epidermis and is composed of fine and loosely arranged collagen fibers. The papillary region is composed of loose areolar connective tissue.
Which is the most superficial layer of the dermis?
papillary layer
the dermis: The layer of skin underneath the epidermis. the papillary layer: The most superficial layer of the dermis.
What are the three layers of the retina what takes place in each layer?
The cellular layers of the retina are as follows: 1) The pigmented epithelium, which is adjacent to the choroid, absorbs light to reduce back reflection of light onto the retina, 2) the photoreceptor layer contains photosensitive outer segments of rods and cones, 3) the outer nuclear layer contains cell bodies of the …
What type of tissue is the retina?
retina, layer of nervous tissue that covers the inside of the back two-thirds of the eyeball, in which stimulation by light occurs, initiating the sensation of vision. The retina is actually an extension of the brain, formed embryonically from neural tissue and connected to the brain proper by the optic nerve.
What are the 4 layers of the retina?
What is the outermost layer of the retina?
The outermost layer of the retina, the retinal pigment epithelium, is tightly attached to the choroid. Assuming that the ocular media (cornea, anterior chamber, lens, and vitreous) are not cloudy, the living retina can be examined using a direct or with a high diopter biconvex retinal lens at the slit lamp.
Which of the following is found in the papillary layer of the dermis and is involved in touch sensation?
Meissner’s corpuscles are found in the papillary layer of dermis and respond to touch.
What is the reticular layer of dermis?
The reticular layer is the lower layer of the dermis and lies directly below the papillary layer. It is the deepest region, this is a layer of dense and irregular connective tissue, which contains collagen and elastin, fibroblasts, macrophages and fat cells. The sweat glands are found deep in this region and in the hypodermis.
The cellular layers of the retina are as follows: 1) The pigmented epithelium, which is adjacent to the choroid, absorbs light to reduce back reflection of light onto the retina, 2) the photoreceptor layer contains photosensitive outer segments of rods and cones, 3) the outer nuclear layer contains cell bodies of the rods and cones, 4) the
What is the structure of the papillary dermis?
The papillary dermis is composed of loose connective tissue that is highly vascular. The reticular layer is the deep layer, forming a thick layer of dense connective tissue that constitutes the bulk of the dermis. Collagen is the principal component of the dermis. Specifically, type I and type III collagen are found in abundance.
Where is the dermis of the skin located?
The dermis is the middle layer of the skin and is located just below the five layers of the epidermis. The area of the basement membrane is the communication channel between the epidermis and the dermis. The dermis supports the epidermis, provides it with nutrients and protects it.