Anatomy 6511 Development of Integumentary System 낱말 카드

Skin

What is the largest organ in the body?

Epidermis and dermis

The skin consists of what two principal layers?

Superficial layer

The epidermis is located on what layer of the skin?

Keratinized stratified squamous epithelium

The epidermis is made up of what type of cells?

Ectoderm

The epidermis is derived from which germ layer?

Avascular

Is the epidermis avascular or vascularized?

Deep layer

The dermis is located on what layer of the skin

Connective tissue

The dermis is made up of what type of tissue?

Mesoderm

The dermis is derived from which germ layer?

Highly vascularized

Is the dermis avascular or vascularized?

Hypodermis

What layer is deep to the skin (deep to the dermis layer of the skin)?

Loose connective tissue

The hypodermis is made up of what?

Vascularized

Is the hypodermis avascular or vascularized?

Epidermis

What layer of the skin is labeled 1?

Dermis

What layer of the skin is labeled 2?

Hypodermis

What layer is labeled 3?

Ectodermal cells

Initially, the embryo is covered by a single layer of what?

Periderm

At the beginning of 2nd month, epithelium divides, and a layer of flattened cells is laid down on a surface called?

Basal layer

At the end of the 4th month, the epidermis acquires its definitive 4 layer arrangement due to proliferated cells in what layer?

Periderm layer

Cells from what layer slough off in the amniotic fluid

Melanocytes

The epidermis is invaded by neural crest cells that will give rise to what cells in the Stratum Basale

Hair, nails, sebaceous gland, sweat gland

What are the skin appendages?

Ectoderm

What germ layer are skin appendages derived from?

Mesenchyme

What is the dermis derived from?

Somatic lateral plate mesoderm, paraxial mesoderm, neural crest

Teh dermis is derived from mesenchyme that has what 3 sources?

Paraxial mesoderm

What is labeled 1?

Splanchnic lateral plate mesoderm

What is labeled 2?

Somatic lateral plate mesoderm

What is labeled 3?

Somatic (parietal) and splanchnic (visceral)

What two layers does the lateral plate mesoderm split into?

Lines Intraembryonic cavity and surrounds the organs

What does the somatic and splanchnic layers of the lateral plate mesoderm surround?

Dermis in the limbs and body wall

What does the somatic lateral plate mesoderm form in the body?

Somites

What does the paraxial mesoderm organize into?

Sclerotome, myotome, dermatome

The paraxial mesoderm organizes into somites and the somites reorganize to give rise to what layers?

Dermatome

What becomes the dermis on the back?

Dermatome

What layer is labeled 1?

Myotome

What layer is labeled 2?

Sclerotome

What layer is labeled 3?

Paraxial mesoderm

What gives rise to the dermis on the back?

Neural crest

What gives rise to the dermis in the face and neck?