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Jessica Roberts
Jessica Roberts • 2 years ago

Inner ear hair cells. Coloured scanning electron micrograph (SEM) of sensory hair cells from the inner ear. These cells are surrounded by a fluid called endolymph. As sound enters the ear it causes waves to form in the endolymph, which in turn cause the hairs to move. The movement is converted to an electrical signal that is passed on to the brain. Each crescent-shaped arrangement of hairs lies atop a single cell.

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Hair cell of the inner ear

Sensory hair cells in the inner ear, SEM.

Inner ear hair cells. Coloured scanning electron micrograph (SEM) of sensory hair cells in the cochlea of the inner ear. The crescent-shaped arrangements of hairs across top are the stereocilia. Each crescent lies atop a single cell. Magnification: x1000 when printed at 10 centimetres wide.

Sickle cell anaemia. Coloured scanning electron micrograph (SEM) of red blood cells in sickle cell anaemia (drepanocytosis). Here, normal red blood cells (rounded) contrast with an elongated sickle- shaped cell (top) & other irregular-shaped cells. Sickle cell anaemia is an inherited blood disease, so-called because the affected red blood cells have abnormal haemoglobin (an oxygen-carrying pigment) that distorts cells into a sickle shape. Due to this defect, sickle cells are fragile......

cochlear inner hair cell from fantastic website Cell Image Library

SEM of hair cells (brown/ pink) in a healthy inner ear. The inner ear converts sound waves into nerve impulses by stimulation of stereocilia (pink, upper frame), projections at the ends of the hair cells. Waves entering the inner ear displace the fluid that surrounds the stereocilia, causing the stereocilia to bend. This bending causes the hair cells to release neurotransmitter chemicals, which generate nerve impulses that travel to the brain along the auditory nerve.

Colored SEM of a human mesenchymal stem cell (MSC). MSCs are multipotent stromal (connective tissue) cells that can differentiate into a variety of cell types, including osteoblasts (bone cells), chondrocytes (cartilage cells), and adipocytes (fat cells). . 4500X

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✯ Nerve cells and glial cells, coloured scanning electron micrograph (SEM). The nerve cells have small cell bodies (pink) and fine extensions called axons and dendrites (mauve). The glial cells have large cell bodies (brown) with thicker extensions (mauve). Neurons are responsible for passing information around the central nervous system (CNS) and from the CNS to the rest of the body. Glial cells are nervous system cells that provide the neurons with structural support and protection.✯

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