Which is TRUE concerning muscle tissue?

A. elastic fibers:Elastic fibers are present in the skin, lungs, and blood vessel walls, providing resilience and the ability to stretch and recoil. In the skin, they maintain flexibility; in the lungs, they allow expansion and recoil during breathing; in blood vessels, they help accommodate pressure changes from blood flow.

B. reticular fibers:Reticular fibers form supportive networks in organs like the spleen, liver, and lymph nodes, but they are not a common feature of skin, lungs, or blood vessel walls.

C. simple squamous epithelium:Simple squamous epithelium is found lining blood vessels (endothelium) and alveoli in the lungs, but it is not present in the skin, so it is not a shared characteristic of all three tissues.

D. simple columnar epithelium:Simple columnar epithelium lines parts of the digestive tract and some glandular ducts but is absent from skin, lungs, and blood vessels, making it irrelevant as a shared feature.

A. partial thickness:Partial-thickness burns extend into the dermis and can damage nerve endings, causing blisters and more intense pain. They are deeper than burns that affect only the epidermis.

B. First-degree:First-degree burns affect only the epidermis, causing redness, minor swelling, and pain. The deeper dermal structures remain intact, allowing for full recovery without scarring.

C. Second-degree:Second-degree burns involve both the epidermis and part of the dermis. They often produce blisters, severe pain, and potential scarring, making them more severe than first-degree burns.

D. Third-degree:Third-degree burns extend through the epidermis and dermis, potentially affecting underlying tissues. They may appear white, brown, or charred and often result in nerve destruction and permanent tissue damage.