Genetics

as nucleotide base sequences that make up genes

Down syndrome (trisomy 21) is a disorder associated with an error in the number of chromosomes present. Other examples of disorders associated with an error in the number of chromosomes are Trisomy 18 (Edwards Syndrome), Trisomy 13 (Patau Syndrome), Triple X syndrome, and Klinefelter Syndrome.

Muscular.-- Jazz(;

The main organ in the excretory system is the kidney. The kidney is the main organ that controls the excretory systems for vertebrates. It is also part of the Urinary system which is part of the excretory system.

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Not that I know of, but it does contain chemicals that heal minor wounds such as small cuts and mouth pimples :)

Mucus.

Restraining orders are not a part of the body's first line of defense.

hahaha thats so funny the real answer is Macrophages

bones

your outer ear

Antibodies are special molecules of protein produced by the immune system that match parts of pathogens and prevent them from infecting cells.

The lungs.

Respiration happens all the time, 24/7, in all living organisms.

When tobacco smoke is inhaled into the respiratory system, the cilia begin to beat slowly. With time, the cilia, which act like a filter, disintegrate and eventually die away. This leads to smokers getting what is known as a smoker's cough.

organisms that engulf and destroy pathogens

The fertilized egg is called a zygote.

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