At short focusing distances, ciliary muscles contract causing the suspensory ligaments to tighten.
The ciliary muscle is an integral muscle of the eye that is constructed as a ring of smooth muscle in the middle layer of the eye, the uvea (vascular layer). It regulates the passage of aqueous humor into Schlemm's canal and governs accommodation for observing objects at different distances.
A suspensory ligament is a ligament that provides support to a body part, particularly an organ. The suspensory ligament protects the fetlock from hyperextension (i.e., falling too low) during exercise. The ligament begins in both the fore and hindlimbs at its connection to the back of the upper cannon bone.
When the ciliary muscle relaxes, its diameter increases; when the suspensory ligaments tighten, the lens becomes thinner. This occurs when concentrating on a celestial object. When the ciliary muscle contracts, the lens becomes much more circular and has more focusing power because the pressure on the zonular fibers is reduced. When the ciliary muscles relax, these fibers contract, pulling the lens out and creating a flatter shape with less focusing power
For more information on suspensory ligaments, visit :
brainly.com/question/12999415
#SPJ4
The third one is ze answer
The tissues that are described as voluntary and involuntary would be MUSCULAR TISSUES or MUSCLES; with voluntary muscles having controlled by one's own will while involuntary muscles work without conscious control.
Answer:
Convection currents are what cause the warmer molten material to rise up, and when it cools, to sink back down.
Explanation:
Answer:
I believe it is the Impermeable rock layer. I am not 100% sure so I am sorry in advance if I am incorrect.
Explanation:
