Which of the following is the type of tissue found in the mo

Which of the following is the type of tissue found in the most superficial layer of thick skin? (circle one) adipose connective tissue areolar connective tissue dense irregular connective tissue simple squamous epithelial tissue stratified squamous epithelial tissue Identify the location(s) on the body where skin is glabrous and contains five layers in the epidermis. (Check all ______back ________face _______palms of the hands ______ scalp _________ soles of the feet Identify structures of the epidermis that are responsible for the formation of fingerprints. (Check all that apply). ________ dermal papillae _________ epidermal ridges _______ keratinocytes _________ melanocytes _______ tactile corpuscles Although melanocytes are the cells that produce melanin, the cells that actually concentrate the melanin in the nucleus are __________ Match the definition listed in column A with the corresponding term listed in column B. cell located in the epidermis that produces melanin dermal papilla an epithelial cell composing the majority of the epidermis epidermal ridge a fold the epidermis that interdigitates with dermal papillae of keratinocyte a \"nipple like\" extension of the dermis into the epidermis melanocyte The _______ (papillary/reticular) layer of the dermis is the thickest layer of the dermis description listed in column A with the corresponding gland listed in column B

Solution

1 .e stratified squamous epithelium

the outermost layer of skin is epidermis made of keratinized stratified squamous epithelial tissue. it consists of four layers of the thin skin and 5 layers of thick skin. the layers are stratum corneum, stratum granulosum, stratum spinosum and stratum basale. thick skin has stratum lucidum between stratum corneum and stratum granulosum.

next is dermis contains papillary layer and the reticular layer made of connective tissue fibers with collagen.

below is the hypodermis made of loose vascular aerolar connective tissue and adipose tissue.

2 c, and e

glabrous skin is skin without hair. thick skin does not have ridgy hairs and contains 5 layers. it is found in palms of hands and soles of feet.

3 a and b

epidermal ridges and dermal papillae are responsible for finger print identification in thumbs and fingers. they are unique to each person.

epidermal ridges contain sweat pores present all along the length which get anchored into the dermal region by finger-like projections called papillae. injuries affecting this dermal papillae or ridges only would show effect on finger prints

4. although not produced in these cells, keratinocytes also known as basal cells have melanin concentrated at their apical region to protect from sunlight. melanin is stored in the perinuclear area of these cells forming a cap protecting DNA from UV damage.

5. cells producing melanin are melanocytes

epithelial cells composing majority about 90% of the epidermis are keratinocytes.

epidermal folds interdigitating with dermal papillae are epidermal ridges

nipple-like extensions of dermis are dermal pappilae.

6. reticular layer is the thickest layer of dermis as it comprises 80% of the dermis with collagen and elastic fibres. papillary layer is the thin layer.