Playland

Waiting in line for the rides definitely affected my heart/breathing rate. As soon as I stepped in the line, my heart would instantly begin to race. I think this was caused by my brain signalling to my heart that I was beginning to feel anxious, which in turn increased my heart rate.

My heart rate definitely started to pick up and soon as I entered lines for rides that I've never been on, or were scared to go on. Rides like hells gate where I knew I would like it and was excited for it, made my heart race, but for a different reason than a ride like the wooden roller coaster which I know I was going to be scared on. On rides that I was nervous for, my hands would shake and I would almost feel dizzy and light-headed. But on rides like hells gate, my heart would beat from excitement.

Heart Dissection.

QUESTIONS:

1. Atria have thin muscular walls, blood enters them through a blood vessel and leave through a valve. Ventricles have thick muscular walls, blood enters them through a valve and leave through a blood vessel.The ventricles need to have thicker muscular walls because they have much further to pump the blood.

2. Arteries - transports oxygenated bloog from the heart (except in pulmonary artery which contains deoxygenated blood). Arteries have:

-thick muscular wall
-much elastic tissue
-small lumen relative to diameter
-not permeable
-valves in pulmonary artery and Aorta only
-blood under high pressure (10-16kPa)
-blood moves in pulses
-blood flows rapidly

Veins transport deoxygenated blood back to the heart (except in pulmonary vein which carries oxygenated blood)
-thin muscular wall
-little elastic tissue
-large lumen relative to diameter
-not capable of constriction
-not permeable
-valves throughout all veins
-blood under low pressure (1kPa)
-no pulses
-blood flows slowly

3. SEMILUNAR VALVES:

semilunar valves prevent the back flow of blood from the arteries to the ventricles

ATRIOVENTRICLE VALVES:

when going from the right atrium to the the right ventricle, it closes acting as a "wall" so that the pumped blood won't go back into the right atrium.The same when the blood goes from the left ventricule to the left atrium

4. What I found interesting about dissecting the heart was both how big and how small it was. Very contradicting, but I can explain. Firstly, at first glance I thought it was humongous. To think that was in a living creature was outstanding. That's in your body and you don't even think twice about it. Secondly, at closer inspection I thought it was actually kind of small. For the really big job it has, it seems really small. Which of course, it really isn't, but that was my initial reaction. 

Fetal Pig dissection.

It was interesting to see everything I saw on paper come to life. Although I felt bad for the pig it was cool to see the parts that we've learned about for so long in the flesh. It was also interesting to see the size of each parts. When we first opened up the fetus I first saw the liver and it was crazy to see how big it really was. I think this was a great hands on learning experience. 

What does engagement look like?

I know I'm a pretty shy person, and answering questions in class along with asking them isn't really my cup of tea. Regardless, I think engagement can be shown in several other ways. Listening and following along is a good example of what engagement looks like. I personally feel like I follow this thoroughly because if I am not asking questions, I am listening to them. Another prime example of being engaged came recently during our question box. I felt like that was a shy persons time to shine. I didn't have to say my question out loud, but wasn't denied finding out something I was wondering about. A third example of being engaged is doing the work. Even if you are participating in class that engagement might just end there. For me, doing the work is just a simple way of extending the participation beyond asking questions in class. Engagement is what you make it. 

Circulation Quiz Review

Compare the following:
 Pulmonary circulation concerns the right side of the body; it pumps blood to the lungs to get oxygen and gives off carbon dioxide. The arteries carry deoxygenated blood to the lungs, and veins carry oxygenated blood to the heart. Systemic circulation concerns the left side of the body; it pumps blood throughout your whole body. The artieries carry oxygenated blood to the whole body and the veins carry deoxygenated blood to the heart.

Arteries have a thicker wall (because they have a larger middle layer), and they have arteriole. Veins are larger in diameter, have a thinner wall and have venule and valves. Similarily, they both have 3 layers and the middle layer is a smooth tissue.

FETAL CIRCULATION

DUCTUS VENOSUS: ambillical vein attaches to vena cava
DUCTUS ARTERIOSIS: between pulmonary trunk and aorta-makes sure blood doesn't go into the lungs of the fetus.
FORAMEN OVALE: helps RA&LA - acts as lungs & digestive system for fetus

Brianna & Kamalvir - blood flow vid

Heart dissection