Contents
Specifically, the hypodermis contains:
- Fibrous bands anchoring the skin to the deep fascia
- Fat, except in the eyelid, scrotum, penis, nipple and areola
- Blood vessels on route to the dermis
- Lymphatic vessels on route from dermis
- Hair follicle roots
- The glandular part of some sudiferous glands
- Nerves: free endings and Pacinian corpuscles
- Bursae, in the space overlying joints in order to facilitate smooth passage of overlying skin
- Fine, flat sheets of muscle, in certain locations, including the scalp, face, hand, nipple, and scrotum, called the panniculus carnosus
In some animals, such as whales and hibernating mammals, the hypodermis forms an important insulating layer and/or food store.
In some plants, the hypodermis is a layer of cells immediately below the epidermis of leaves. It is often mechanically strengthened, for example, in pine leaves, forming an extra protective layer or a water storage tissue.
According to the eighth edition of Developmental Biology by Scott F. Gilbert, the hypodermis of C. elegans is derived from ectoderm.
Read more about this topic: Subcutaneous Tissue
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