Tag Archives: physiology

4.2 Respiration

For self-assessment questions, with exercises and discussions, just click on the correct topic at Biology GCSE & IGCSE Question Bank. A powerpoint can be downloaded from the same site here. The s-cool revision site lets you revise the topic, summarizes the topic & tests you on it. Skoool gives you a lesson, including progress questions, for each Biology topic but you’ll need sound on for it. GCSE Bitesize has revision pages (that take you through the topic), a test and an activity.

Lessons from Ms Cooper: Respiration introduction in 7m; Aerobic respiration in 14m; Anaerobic respiration in 12m; Designing an experiment for rate of respiration in 4m 22s.

What is aerobic respiration? a short (51s) introductory video from Clipbank.

Science Bank 8 (Biological Reactions): you only need Part 2 – Respiration (from 5m 20s to 9m 55s):

Dr. Kiki talks about how fermentation works and whips up some home made ginger ale at the end.

11.2 Movement

11.2 Movement from Bob Smullen

Here is another presentation, taking you through muscle contraction step by step:

Two video lessons on 11.2 Movement: a 7m video from Luiz Mello and a 15m video from Briscucation.

A 5m TED-Ed intro to How the Muscular System works and from Crash Course, Muscles, part 1 – Muscle Cells: Crash Course A&P #21 in 10m and Muscles, part 2 – Organismal Level: Crash Course A&P #22 in 10m 40s.

Paul Andersen explains The Muscular System in 5m 59s.

In Crash Course Biology #30 The Skeletal System: It’s ALIVE!, Hank introduces us to the framework of our bodies, our skeleton and in #31 – Big Guns: The Muscular System, he tells us the story of the complicated chemical dance that allows our skeletal muscles to contract and relax.

This is an amazing gif from tabletop whale – you have to check it out:

An animated guide to the human body : The muscle edition

11.3 The Kidney & Osmoregulation

11.3 kidney from Bob Smullen


Mr Paul Andersen (from Bozeman High) describes Osmoregulation (including in fish which you don’t need to know) in a 8m 57s lesson.

Osmoregulator or Osmoconformer? Here are two videos about contractile vacuoles in Paramecium (they are osmoregulators): Paramecium vacuole (1m video) and contractile vacuole (a 27s explanation). If it goes wrong – Paramecium exploding!


A nice introduction to how the kidneys work (from TED-Ed):

An animated, narrated tutorial on the mammalian kidney which also includes a quiz (from Sinauer Associates).

In Crash Course Biology #29 – The Excretory System: From Your Heart to the Toilet, Hank takes us on the fascinating journey through our excretory system to learn how our kidneys make pee.

11.4 Sexual Reproduction

6.6. & 11.4 Reproduction from Bob Smullen

Paul Andersen describes The Reproductive System in 9m. In Crash Course Biology #34 – The Reproductive System: How Gonads Go, Hank lets us in on the meaning of life, at least from a biological perspective – it’s reproduction.


Fantastic animated tutorials from McGraw Hill Education – spermatogenesis &  the  maturation of the oocyte & follicle.


Impressive Journey of Sperm – a 6m video on fertilisation.


Day 0 to 7 Fertilization, Zygote, Blastocyst 4m video from Armando Hasudungan. Implantation – a 2m 53s animation.

A Biologist’s Mother’s Day Song (3m 50s):

Amazing – Child is born still inside Amniotic Sac – happens to just one in every 80,000 babies