Homework Learning Package 6, BOOK 2 Q2(a), (b)(i) Q3(a) – (d)(i) If you are unsure of any of these questions, ASK ME FOR HELP Due Thursday 18 th September No homework = Friday afternoon detention with Miss Tagore

Lesson Starter Mapping from memory… you have 10 minutes to reproduce an unseen image… First group to complete without cheating wins a prize!!!

Title: The Lungs 21 November 2016 Learning question: How are the lungs adapted for supplying oxygen to the body? Homework: AS Human Biology Booklet 2 (Year 12) Learning Package 6

Key words Tissue Organ Squamous epithelium Ciliated epithelium Gas exchange Spirometer Lung capacity Resuscitation Tidal volume Vital capacity

Aims from specification (a) explain the meaning of the terms tissue and organ; (b) explain the relationships between cells, tissues and organs, with reference to squamous epithelial cells in the alveoli of the lung; (c) describe, with the aid of diagrams and photographs, the structure of ciliated epithelium, goblet cells and squamous epithelial cells and relate their structures to their functions; (d) describe and interpret photomicrographs of lung tissue;

(a) explain the meaning of the terms tissue and organ; In pairs, find the definition of the words tissue and organ Write out a definition for you and your partner to exchange – If looking for the word tissue read page 48 of textbook – If looking for the word organ read page 49 of textbook

Can you relate this to our lesson?

(b) explain the relationships between cells, tissues and organs, with reference to squamous epithelial cells in the alveoli of the lung; Is there any difference between these two images? What are they? Can you explain the differences using the words cell and tissue?

(c) describe, with the aid of diagrams and photographs, the structure of ciliated epithelium, goblet cells and squamous epithelial cells and relate their structures to their functions;

Why are squamous epithelial cells used in the alveoli of the lungs? Squamous epithelial cells are flat, thin cells. These cells form the alveoli (air sacs) Because they are thin, O 2 and CO 2 have less barriers to get through This makes diffusion of gases efficient

Why smoking isn’t cool… Note about Smoking: Smoke paralyses the cilia and continued smoking destroys the cilia / ciliated cells, which are then replaced by goblet cells. This causes the accumulation of excess mucus in the lungs - together with particles, tar, and carcinogens.

Your task READ pages again. Make sure you understand it! Answer questions 1-3 on page 49 in full sentences – this is part of your class note. Mark your answers with a different colour pen Move on to practical

Practical work (d) describe and interpret photomicrographs of lung tissue; Using bioviewers to identify cells and tissues in the lungs You WILL be examined on this in June!!!

Homework Learning Package 6, BOOK 2 Q2(a), (b)(i) Q3(a) – (d)(i) If you are unsure of any of these questions, ASK ME FOR HELP Due Thursday 18 th September No homework = Friday afternoon detention with Miss Tagore