vity Stands on end to increase its apparent st dramatic in a scared cat. of the

Question

vity Stands on end to increase its apparent st dramatic in a scared cat. of the ous glands surrounding the follicle, causing a The on the amount of sebum to be released. ACTIVITV 3 omparison of Hairy and Relatively Hair-Free Skin Microscopically While thick skin has no hair follicles or Sb both glands, thin skin typical of most of the bodyls scalp, of course, has the highest density of hai has both. The 1. Obtain a prepared slide of the human scalny carefully under the microscope. Compare your-ntily omicrograph (Figure 10.6a), andetO I your tissue slide to as possible of the diagrammed structures ( Hoithe diagrammed structures (Figure 10.. from different from this stratified squamous epithelium a that observed in the esophagus? ope How do similar epithelia? these differences relate to the functions of these nct igure 10.6b). Compare the slide to the previous photomi- crograph (Figure 10.6a). In what ways does the thick skin of the palm or sole differ from the thin skin of the scalp? 2. Obtain a prepared slide of hairless skin of the palm or sole (F

Explanation / Answer

2. Thin skin of scalp is keratinised type of stratified squamous epithelium. In the epidermis of thin skin, the layer stratum lucidum is absent. The thin skin of scalp has thicker dermis than the thick skin of palm. This property of thin skin helps it to recover easily if it is damaged.

The thicker skin of palm or sole helps it to endure friction. Palms and soles have a unique skin, having ridges called footprints and fingerprints. The dermal layer of the skin connects to the epithelial layer through many papillae which are finger like projections of connective tissue. Extra thickness of palms or soles is also provided by keratin. So, the skin of palms or soles also have keratinised stratified squamous epithelium. Thick skin generally has scarcity of sebaceous glands or apocrine sweat glands.

( It would have been better if the photomicrographs of figures 10.6a and 10.6b would also have been provided).

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