it is called the epiglottis, it is made out of cartilage
The epiglottis, but its not very efficient. (not a tight seal.)
Animal cell structure differs from that of humans because humans have several billion cells and animals sometimes only have one. However, the basic structure of each cell is similar.
The basic unit of a culture's social structure is the family.
people live on earth because it is the only planet that can supply us with the most important element of all which is to humans oxygen gas (O2). also with this oxygen comes the Ozone layer(O3). this layer prevents radiation from entering our bodys and helps keep the world cooler.
no
White blood cells protects us (humans) by preventing pathogens from entering the body.
Rasputin!
Velum is a thin, membranous structure that separates the oral and nasal cavities in some animals, including humans. This structure helps to regulate airflow and prevents food and liquid from entering the nasal passages during swallowing.
the structure needed by humans to stand and move is the bone and the muscles
It is the skin or epidermis.
The valves in the veins
Animal cell structure differs from that of humans because humans have several billion cells and animals sometimes only have one. However, the basic structure of each cell is similar.
the presence of a buffer
Your skin has the protein called keratin in it. The keratin in your skin makes you waterproof.
Humans,animals,and plants
plagioclimax is when the humans have influenced the vegetation so that is prevents it from reaching it climatic climax
Cloaca
...the feet?