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Leaf
Brain stem.
The small circles/ pores (although they are not really pores) are the scars of the xylem and phloem tubes that were joining the leaf to the stem. Imagine cutting an electrical cable in half, if you look at it from the side you will see the cross section of the individual wires that were running through the cable
Stoma (plural stomata), they are the pores used for gas exchange.
When fossil fuels are burned, they release smoke and DUST. The dust then blocks the pores found in leaves of trees blocking of pores prevents trees from breathing thus the plant withers and die.
Leaf
pores
they serve as the breathing organs for plants
The brain stem is the part that controls breathing, it is the stem that allows the respiratory system to work and help you breathe
Breathing is controlled in the brainstem.
brain stem
brain stem
The spikes protect the stem of the cactus plant. The reason is the stem's responsibility for moving, processing and storing water and watery products and solutions. The stem also is responsible for carrying out the photosynthetic interaction with sunlight to make energizing, life sustaining starches and sugars.The spikes protect the overall stem, and specific stem parts. For example, the stem is the location of the breathing pores, or stomata. The stomata are the points at which gases within the cactus are exchanged for atmospheric gases. The stem also is the location of the growth buds from which flowers, fruits and seeds form.
brain stem
brain stem injuries
Yes.
brain stem injuries