00:01
Hi, we are given two questions.
00:03
So first, let's see each question one by one.
00:05
Okay, the first question is about the spinal column of hominus altered for bipedal walking.
00:11
Okay, the spinal column of hominus.
00:17
Horminus is human.
00:20
Huminous means human, okay? is altered for bipedal walking.
00:25
Bipedal walking is walking with the two legs, okay? two legs walking.
00:33
Okay.
00:34
We are given four options.
00:37
By becoming s shape, becoming c shape, having same size vertebra for whole length, and becoming straight as an arrow.
00:43
Okay, the correct answer is becoming s -shaped.
00:48
Okay, becoming s -shaped.
00:52
This is the correct answer.
00:54
Okay.
00:55
So let's see.
00:56
Humans, they have yes -shaped, s -shaped curved spinal cord.
01:07
They have curved spinal cord, which is almost yes -shaped.
01:12
This helps in the support.
01:16
This gives support and balance.
01:20
Okay, support and balance for walking.
01:24
Okay, walking.
01:27
Because, why? because weight of the chest, right? weight of our chest the weight of our chest sits almost directly above between the joints of spine and pelvis okay spine and pelvis it sits right above the weight of the chest is right above the joint of spine and pelvis okay this helps in the balance okay this helps in the balance are said above and absorbs and absorbs shock of walking, okay, absorbs the shock of walking.
02:08
Okay, these are the advantages or the use of being yes shaved.
02:14
Okay, here if we talk about the vertebral column, so let's draw a human, okay, okay? so here's the nose, eyes.
02:27
The human is uh this uh this uh face is uh directed towards this direction okay so the vertebral the spinal column will be like okay like this as you can see it's more or less yes shaped okay this is thoracic this is thoracic region and this is lumbar region okay as we can see the the vertebral column of lumbar region take a forward bend, forward bend and this takes a backward bend, okay? backward bend, right? so because of this forward bend, the human use less muscular, less muscular effort for walking and to stand straight...