The Digestive System

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E G O S D H K E C D K F E F K G G U D W N
S K S S T V P P Y D A Y A J M H K S U Y M
A K F U X D C T W M I U S G C C M I O J D
D H O M F X E M B R U U T A W E Y S D P C
I M G A Y R V V H E G O M M S N W L E E T
T P K V K X O G W A D O I A T M N A N D B
P I R D U Y O H H D T N D B D L A T U A A
E I E O V F S P W S M I K C Q S K S M F M
P V C V F Y O J V Q T N Q Y S Q O I F N B
O C G U M S Y C N P F J N A K B G R C J J
X C G S E A U S E P C W E X K G E E F A K
E C K O C N T P B J G R P T Q J Q P C R K
L M P S Y P O C T T C O E O A I X I D I A
J J V I W D W E O N O C M S O Y D M Y I T
I H Q M N O C H A D Y C S G Q H X E I K G
R M O E R P W P P H L V J T F L P C S A X
H G E H S F A E C U S P O O I Q W T Q K I
T A M V D K R W I S G U A V J W G A S U R
G P E X V M Q U F J E B E G G V F D N A A
U I P J X W J L A O D R N Y Q A O S Q I Q
Q N U V R R U W G V F H I H N P U K O T O

Clues

  • Catalyses the hydrolysis of a peptide bond linking the end amino acid in a peptide chain E.g. carboxypeptidases & aminopeptidases (12)
  • Catalyses the hydrolysis of some interior peptide bonds of a protein molecule E.g. pepsin, trypsin & chymotrypsin (13)
  • First part of the small intestine receiving food from the stomach and secretions from liver and pancreas Villi (microscopic infolds) - increasing surface area (8)
  • Mechanical digestion of food - rugae help (ridges). Gastric glands secrete hydrochloric acid and enzymes (chemical digestion) Muscle layer is thick (3 different layers) to provide power to contract and relax Lots of mucus produced (7)
  • Mechanical digestion through action of teeth. Salivary glands release enzymes to start chemical digestion (5)
  • Moves bolus of food from mouth to stomach by a series of rhythmic contractions called peristalsis Several cells thick and protects the underlying tissues from damage when swallowing (10)
  • Produces bile which helps emulsify fats and neutralise stomach acid (5)
  • Produces pancreatic juice containing enzymes (8)
  • Semi solid material is expelled through the anus (6, 3)
  • Wave like contractions that happen in the oesophagus, stomach and intestines that act to propel food along (11)

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