A 42-year-old male reports pain in his lower back for the past month. The pain sometimes radiates to his left leg. In determining the cause of the back pain, based on your knowledge of anatomy, what nerve roots might be involved

Sciatic nerve.

Explanation:

The sciatic nerve is the longest and thickest in the anatomy and it originates from the sacral plexus. The sciatic nerve and its nerve branches allow movement and sensation (motor and sensory functions) in the thigh, knee, calf, ankle, feet, and fingers. When the pain exceeds the lumbar area and reaches the lower limbs, we speak of radiating lumbar pain. If the pain spreads from the lower back to the heel or foot, down the back or side of the thigh, we call it lumbosciatica (or just sciatica). Its presence suggests injury to the nerve roots that come out of the lumbar spine and carry the sensation or orders to contract the muscles to the lower limbs through the sciatic nerve.

hey bro i looked it up on google the structure of the eye-spot in euglena viridie, e. ehrenbergii, and phacus pyriyorme is not as franzé haa described it. the so-called “crystal body” and “lens bodies” were not found in any of the individuals of the species examined by me. as earlier observers have stated, the eye-spot consists simply of a mass of pigment granules arranged in a single layer, and probably embedded in a protoplasmic framework, but the latter could not be seen, and its presence was only inferred from the fact that the pigment granules must be held together in some way, thd the eye-spot as a whole is capable of expansion, and that the pigment granules can be separated from each other.

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