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The respiratory system begins in the head and neck, with air entering and leaving the body through the mouth and nose. The respiratory system involving the head and neck includes: the nasal cavity for filtering, moistening, and warming the air; the pharynx or throat which is the combining point for respiratory and digestive system
The skin is one of the largest organs of the body. In humans, it accounts for about 12 to 15 percent of total body weight and covers 1.5 to 2 m 2 of surface area. [1] 3D still showing human integumentary system. The skin (integument) is a composite organ, made up of at least two major layers of tissue: the epidermis and the dermis. [2]
Paranasal sinuses are a group of four paired air-filled spaces that surround the nasal cavity. [1] The maxillary sinuses are located under the eyes; the frontal sinuses are above the eyes; the ethmoidal sinuses are between the eyes and the sphenoidal sinuses are behind the eyes.
It sits on both sides of the sphenoidal bone and pituitary gland, approximately 1 × 2 cm in size in an adult. [2] The carotid siphon of the internal carotid artery, and cranial nerves III, IV, V (branches V 1 and V 2) and VI all pass through this blood filled space. Both sides of cavernous sinus are connected to each other via intercavernous ...
Keratin protein expression within the various layers and anatomic locations of the human integumentary system Keratin type Location of expression 1: Suprabasal epidermis of skin 2 (2e) Granular layer: 3: Cornea: 4: Suprabasal epidermis of mucosa 5: Basal layer: 6a: Suprabasal palmoplantar skin 6b: Basal palmoplantar skin Nail bed Hair follicle ...
Skull in situ Human head skull from side Anatomy of a flat bone – the periosteum of the neurocranium is known as the pericranium Human skull from the front Side bones of skull. The human skull is the bone structure that forms the head in the human skeleton. It supports the structures of the face and forms a cavity for the brain. Like the ...
In the human skull, the frontal bone or sincipital bone is a unpaired bone which consists of two portions. [1] These are the vertically oriented squamous part, and the horizontally oriented orbital part, making up the bony part of the forehead, part of the bony orbital cavity holding the eye, and part of the bony part of the nose respectively.
Sebaceous glands are part of the body's integumentary system and serve to protect the body against microorganisms. Sebaceous glands secrete acids that form the acid mantle . This is a thin, slightly acidic film on the surface of the skin that acts as a barrier to microbes that might penetrate the skin. [ 20 ]