Discuss the bone under the following headlines: Composition, type, parts and structure.

Bones are composed of two types of tissue:

1. Compact (cortical) bone: A hard outer layer that is dense, strong, and durable. It makes up around 80 percent of adult bone mass.

2. Cancellous (trabecular or spongy) bone: This consists of a network of trabeculae or rod-like structures. It is lighter, less dense, and more flexible than compact bone.

Also found in bones:

osteoblasts and osteocytes, responsible for creating bone

osteoclasts or bone resorbing cells

osteoid, a mix of collagen and other proteins

inorganic mineral salts within the matrix

nerves and blood vessels

bone marrow

cartilage

membranes, including the endosteum and periosteum

Explanation:

which are post-impressionist paintings? check all that apply?

explanation:

post-impressionism is a predominantly french art movement that developed roughly between 1886 and 1905, from the last impressionist exhibition to the birth of fauvism. post-impressionism emerged as a reaction against impressionists' concern for the naturalistic depiction of light and color.

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genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).