Dermis

Question 1

Compare and contrast the composition of the papillary and reticular regions of the dermis, in terms of size, location, type of connective tissue & accessory structures present in each.

Answer 1

Papillary
Makes up 1/5 of the dermis
-superficial layer
-areolar connective tissue
-capillary loops, corpuscles of touch, and free nerve endings

Reticular
Makes up 4/5 of the dermis
-deep layer
-dense irregular connective tissue
-hair follicles, root hair plexus, lamellated corpuscles, blood vessels, sebaceous glands, sudoriferous glands

Question 2

name a couple of structures found within the dermal papilla, and give a general overview of the role of the dermal papilla.

Answer 2

The dermal papillae increase the surface area of the most superficial part of the dermis. The structures found within the dermal papilla are capillary loops, free nerve endings, and corpuscles of touch

Question 3

Relate dermal papilla to epidermal ridges & to fingerprints

Answer 3

The dermal papilla interlocks with epidermal ridges which form fingerprints. The epidermal ridges are unique to each individual, making everyone’s fingerprints different.

Question 4

Be able to name and give a brief (one-sentence) description of each of the accessory structures of the reticular layer of the dermis

Answer 4

Sebaceous gland= secretes oil
Sudoriferous gland= secretes sweat
Arrector pili= connects hair to the follicle
Pacinian corpuscle= detects pressure

Question 5

Name a couple of key cells found in the dermis and a brief description of their roles.

Answer 5

Intradermal macrophages= protect the body from invasive infections
Fibroblasts= create collagen proteins that help maintain the structural framework of tissues
Adiposcytes= stores energy

Question 6

Name a couple of types of connective tissue and cells found in the sub-Q layer and briefly describe their function. Briefly explain how the dermis is anchored to the sub-Q & what the sub-Q is anchored to even deeper!

Answer 6

Adipose connective tissue and areolar connective tissue are found in the sub-Q layer. Adipocytes, fibroblasts, and immune cells are also found in the sub-Q layer. Their role is to store energy