As you study the slide of human scalp, locate all of the structures you identified as you studied the model of skin. This preparation is a very thin slice of tissue and will not contain all parts of all structures. In you study of the model, you saw the coiled tubular structure of the sweat gland. You also will see parts of the sweat gland tubule in cross and/or longitudinal sections. Can you see the duct of the sudoriferous gland?
What is the most superficial layer of epidermis?
What is the deepest layer of epidermis?
Can you find an opening of a sebaceous gland into a hair follicle?
What type of cells compose a sebaceous gland?
Where does an arrector pili muscle attach?
Based on the given information, let's address the questions one by one:
1. Can you see the duct of the sudoriferous gland?
Since the preparation is a very thin slice of tissue, it may or may not contain the entire duct of the sudoriferous gland. It will depend on the specific location of the cut and the presence of the duct within that particular region.
2. What is the most superficial layer of epidermis?
The most superficial layer of the epidermis is called the stratum corneum. It is the outermost layer composed of dead, flattened keratinocytes.
3. What is the deepest layer of epidermis?
The deepest layer of the epidermis is called the stratum basale (also known as the basal layer or germinativum). It is the layer where new cells are continuously produced through cell division.
4. Can you find an opening of a sebaceous gland into a hair follicle?
It is possible to observe the opening of a sebaceous gland into a hair follicle in a thin slice of tissue. The opening is known as the sebaceous duct or sebaceous canal, and it allows the sebum produced by the sebaceous gland to reach the hair shaft.
5. What type of cells compose a sebaceous gland?
Sebaceous glands are composed of specialized epithelial cells known as sebocytes. These cells are responsible for producing and secreting sebum, an oily substance that helps lubricate the skin.
6. Where does an arrector pili muscle attach?
The arrector pili muscle attaches to the hair follicle at one end and to the dermal tissue on the other end. When the muscle contracts, it causes the hair to stand erect, leading to the phenomenon commonly known as "goosebumps."