Introduction
Good morning learners 😄! I hope that you are doing very well and hoping that you are all safe from the pandemic and practising the covid-19 regulations.
Today you will be doing an Practical investigation based on the topic that we have covered ( Excretory system in Humans). You will have to study a human excretory system model and answer questions that will follow.
A model and a video will be provided for you guys just to remind you guys a little bit of the topic.
Task
You are required to do a practical investigation on the Human excretory system. A model and a video will be provided for you guys just to remind you guys a little bit of the topic that we have covered. You will be doing an on the various organs in the system and answer the questions that will follow.
Process
PRACTICAL INVESTIGATION
Structure of the Urinary System
What you need
- Model of the human urinary system
What you should do
- Organise yourselves into groups of 3 (Consider and follow the regulations of the Covid-19 pandemic)
- Make a careful study of the of the following parts of the urinary system in the model:
- Kidneys
- Ureters
- Bladder
- Urethra
- Identify the following structures associated with the urinary system in the model:
- Aorta
- Inferior vena cava
- Renal arteries
- Renal veins
- Adrenal glands
- Write down the functions of the kidney, ureter, bladder, urethra, renal artery and renal vein after you have discussed them with other members in the group.
- Beside the kidneys, name two other organs of the excretory system.
(20 marks)
Evaluation
MARKING GUIDE OF THE PRACTICAL INVESTIGATION
STRUCTURE OF THE URINARY SYSTEM
What you need
- Model of the human urinary system
What you should do
- Organize yourselves in groups of 3. Consider the covid-19 regulations
- Wear your mask
- Practice social- distancing, 1,5 distance apart
- Wash your hands with soap for at least 20 seconds or use 70 % sanitizer
- Be safe
- Learners are making a careful study of the following parts of the urinary system in the model which are:
- Kidney
- Ureters
- Bladder
- Urethra
As part of the covid-19 regulations, there is a bottle of hand sanitizer in each of the working station. So as learners sanitize after 10 minutes and the teacher is monitoring the stations so as to make sure that regulations are followed in trying to fight the spread of the corona virus.
As leaners are making careful study of the model individually as they are 1,5 meter apart. So after each learner is done studying the model, the model is sanitized and given to the other member of the group.
- Learners are identifying structures associated with the urinary system in the model. Each leaner is given a chance and get to discover those structures and identify them.
- Possible answers (Discussions of the functions)
Kidney- The kidneys are a pair of bean- shaped organs in the abdominal cavity on either side of the midline, just below the diaphragm. The right kidney is usually lower than the left kidney. The renal artery, renal vein and ureter are attached to the kidney at its hilum. The hilum occurs on the concave, medical side of the kidney.
Ureters- Are a pair of duct which carry urine from the kidneys to the bladder. Each of ureter begins within each kidney as a kidney as a widened portion, the pelvis.
Bladder- Is a muscular sac which stores urine temporally. It can hold up to 600ml of urine.
Urethra- Is a tube which carries urine from the bladder to the exterior. In the male, the urethra, which runs through the penis, carries urine as well as semen. In the female, the urethra and vagina opens separately.
Renal artery- Carries blood laden with nitrogenous waste to the kidney.
Renal vein- Carries blood with very little nitrogenous waste away from the kidneys.
5.
- Skin
- Lungs
[20 MARKS]
Conclusion
The purpose of doing the task was to make sure that learners get to understand and relate to organs that they have in their own bodies as well as understand the excretory system . The response was very positive as now they get to learn what really happens in their bodie as their everyday life. The excretory system was understood very well. 😀☺
Credits
Understanding Life Sciences Grade 11
T. Isaac S. Chetty H.T Manganye N.L Mpondwana L. White
Teacher Page
As a teacher i believe in learning through experience. For me it was not a difficult topic to teach the leaners because i knew that my learners arw going to relate to the topic as it closely related to them and they were able to make sense to some of the sub- headings as they have the excretory system to themselves. We should teach learners knowledge not scientific knowledge.