Exercise 14: Animal Integuments and Integumentary Derivatives
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It is the general term for the outer covering of animals.
integument
Identify the functions of integuments.
protection, sensation, and homeostasis
Complete the sentence below: Integuments consist of one or more layers of ____________ and ____________ tissues.
connective, epithelial
Are external structures which originate from the integument.
integumentary derivatives
TRUE or FALSE: Integumentary derivatives include long-lasting secretions and deposits of the epithelium.
True
It is formed by hardened integumentary derivatives which functions for the protection of internal structures and attachment of muscles.
exoskeleton
It refers to the epithelial layer of the integument of invertebrates.
epidermis
Identify the functions of the substances secreted by the epidermis.
• protection • prevention of desiccation
TRUE or FALSE: In invertebrates, integument derivatives are largely secretions that are laid over the epithelium.
True
Complete the sentence below: The cuticle of the earthworm is ___________, while its hair-like setae are ____________.
collagenous, chitinous
Complete the sentence below: The chitinous ____________ of arthropods is segmented into ____________, with certain segments having ____________.
cuticle, plates, setae
It refers to the exposed part of the snail.
foot
Complete the sentence below: The foot of the snail is covered by the ____________.
epidermis
Complete the sentence below: The visceral mass under the shell is covered by the ____________.
mantle
Complete the sentence below: The mantle of the snail is composed of two layers of ____________ separated by one layer of ____________.
epithelium, connective tissue
It refers to the thick, non-cellular outer layer of Ascaris lumbricoides.
cuticle
Complete the sentence below: In Ascaris lumbricoides, inner to the cuticle is the thin pigmented ____________.
epidermis
TRUE or FALSE: The epidermis secretes the cuticle.
True
Complete the sentence below: In Ascaris lumbricoides, the coiled ____________ is beneath the epidermis.
longitudinal muscle
It refers to the complex integument of all vertebrates.
skin
Identify the 2 regions of the skin.
• epidermis • dermis or corium
In all vertebrates, the epidermis consists of ____________ epithelium.
stratified squamous
In all vertebrates, the dermis consists of ____________.
mostly connective tissue
It refers to the outermost layer of the epidermis that is usually composed of one layer.
stratum corneum