Either of the pair of organs occupying the cavity of the thorax that effect the aeration of the blood.
Lungs
D008297
Male
Males
D008875
Middle Aged
An adult aged 45 - 64 years.
Middle Age
D002648
Child
A person 6 to 12 years of age. An individual 2 to 5 years old is CHILD, PRESCHOOL.
Children
D002675
Child, Preschool
A child between the ages of 2 and 5.
Children, Preschool,Preschool Child,Preschool Children
D003094
Collagen
A polypeptide substance comprising about one third of the total protein in mammalian organisms. It is the main constituent of SKIN; CONNECTIVE TISSUE; and the organic substance of bones (BONE AND BONES) and teeth (TOOTH).