10 Questions
What are the two layers of a frog's skin?
Epidermis and dermis
What structures are found in the outer layer of the dermis?
Mucus glands and chromatophores
Why is the frog's skin considered an important respiratory organ?
It is moist
What is the function of mucus glands in a frog’s skin?
To secrete mucus, which makes the outer surface slippery
What causes the color of a frog's skin to change?
Change in the distribution of pigment particles in the chromatophores
What is the role of muscles in a frog’s skin?
To prevent the entry of harmful microbes
What distinguishes the dorsal and ventral sides of a frog's skin by color?
The dorsal side is green and the ventral side is pale yellow or whitish
Describe the corneous layer of a frog's skin.
It consists of many flattened dead cells, which are periodically shed
What space lies between the skin and the underlying muscles?
Subcutaneous lymph space
Which layer of the frog's skin contains blood vessels?
Dermis
Study Notes
Body Wall
- Consists of skin, subcutaneous lymph space, muscles, subvertebral lymph space, and parietal peritoneum.
Skin
- Outer surface of a frog's body is covered by smooth, slimy, moist, and glandular skin.
- Skin is devoid of hairs and scales.
- Dorsal side is green, ventral side is pale yellow or whitish.
- Skin has two layers: epidermis and dermis.
- Epidermis has two layers: corneous layer and malpighian layer.
- Corneous layer has many flattened dead cells, which are periodically shed.
- Malpighian layer has cells that are pushed towards the surface, becoming the flattened dead cells of the corneous layer.
- Dermis consists of connective tissue, muscle fibres, nerves, blood vessels, and lymph spaces.
- Spherical mucus glands are found in the outer layer of the dermis, with ducts opening on the surface by pores.
- Chromatophores (pigment cells) are found in the outer region of the dermis beneath the epidermis.
- Skin functions: protect underlying muscles and internal organs, change color to escape enemies, secrete mucus to make the body slippery, reduce friction in water during swimming, prevent entry of harmful microbes, and function as a respiratory organ.
Subcutaneous Lymph Space
- Space between the skin and underlying muscles.
Subvertebral Lymph Space
- Space between the muscles and parietal peritoneum.
Parietal Peritoneum
- Innermost lining of the skin.
Coelom, Peritoneum, and Mesenteries
- No information provided in the given text.
Learn about the structure and composition of a frog's body wall, including its skin, muscles, and lymph spaces. Understand the characteristics of a frog's skin and its layers.
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