This one is especially for Sophia!
Author: Tara Hamilton-Fay
Why is Resting Membrane Potential of a neuron negative?
Synaptic Transmission (neurotransmitter release)
Graded Potential in a Neuron
Skeletal Muscle vs. Smooth Muscle Contraction
How does cardiac muscle contract?
Joint actions
Hydrostatic and Osmotic Pressure
Lymphatic System via Anatomy In Clay model
I took the Anatomy In Clay skeleton and laid a variety of lymphatic system structures/organs over it. This is a good, course-specific anatomical overview.
Innate and Adaptive Immunity Explained
First 48 seconds: Overview
0:48 to about 4:55, Innate
4:55 to end, Adaptive