Answer:
protiens
Explanation:
Proteins, among the most complex of all organic compounds, are composed of amino acids which contain carbon, hydrogen, oxygen, and nitrogen atoms.
Blastula --> early embryo with spherical shape if cells before gastrulation into germ layers
The body needs to maintain the amount of oxygen that reaches our cells. If we exercise a lot, our breathing rate increases. More oxygen enables our cells to <span>more quickly respire aerobically, so that our muscles can contract more rapidly.
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Answer:
synapse is the connection of the axons of one neuron and the dendrites of another, myelin is the substance that protects the grey matter from the bony surface of the head for example, nucleus of a neuron is the main part of the nersous cell and neurotransmiters are the substances that make synapses posible ( and sometimes efficient)
