Bone Marrow
your body informs .
Bones are composed of multiple layers, including the periosteum (outer layer), compact bone (dense, strong layer), spongy bone (porous inner layer), and bone marrow (innermost layer where blood cells are produced). These layers work together to provide structure, support, and protection to the body.
The inner core .
The skin is made up of three main layers of tissue: the epidermis (outer layer), dermis (middle layer), and hypodermis (innermost layer). The epidermis is primarily composed of epithelial tissue, the dermis contains connective tissue, blood vessels, and nerves, and the hypodermis consists of adipose tissue.
The bonelike matter between the protective enamel layer and the innermost layer of a tooth is called dentin. Dentin is a hard tissue that makes up the bulk of the tooth and provides structural support. It contains microscopic tubules that can transmit sensations, such as temperature changes and pressure, to the nerve endings in the pulp. Dentin is less dense than enamel and is more vulnerable to decay.
The innermost layer of Earth's atmosphere is called the troposphere. It is where most weather phenomena occur and is the layer closest to the Earth's surface, extending up to about 10-15 kilometers in altitude.
The three main layers of the hair shaft are the medulla (innermost layer), cortex (middle layer), and cuticle (outer layer). The medulla is the innermost part of the hair shaft, often absent in fine hairs. The cortex provides strength, color, and texture to the hair, while the cuticle is the protective outer layer made up of overlapping scales.
The part of Earth's rocky outer layer that makes up the landmasses is the what ?
bones
sperm
The pelvic bones (the ilium and the ischium).
A double layer of phospholipids makes up the plasma membrane.