Form and function in chordates
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Form and Function in Chordates. 33-3. Tunicate--filter feeding. Lancelet—filter feeding. Feeding. Shark. Salamander. Lizard. Pigeon. Cow. Esophagus Stomach Intestine Liver Gallbladder Pancreas Cloaca Crop Gizzard Cecum Rectum. Respiration. Respiration.

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Form and Function in Chordates

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Form and function in chordates

Form and Function in Chordates

33-3


Tunicate filter feeding

Tunicate--filter feeding


Lancelet filter feeding

Lancelet—filter feeding


Feeding

Feeding

Shark

Salamander

Lizard

Pigeon

Cow

Esophagus

Stomach

Intestine

Liver

Gallbladder

Pancreas

Cloaca

Crop

Gizzard

Cecum

Rectum


Respiration

Respiration


Respiration1

Respiration

Nostrils, mouth, and throat

Trachea

Lung

Air sac

Salamander

Primate

Pigeon

Lizard


Respiration2

Respiration

Comparing Functions of Chordates

Respiration

Non- vertebrate Chordates

Gills and diffusion

Gills/air sacs

Simple lungs and skin

Lungs

Lungs (tubes and air sacs; one-way flow)

Lungs (alveoli)

Birds

Function

Fishes

Amphibians (adult)

Mammals

Reptiles

Nostrils, mouth, and throat

Trachea

Lung

Air sac


Circulation

Circulation

Double-Loop Circulatory System

Single-LoopCirculatory System

FISHES

CROCODILIANS, BIRDS,AND MAMMALS

MOST REPTILES


Circulation1

Circulation

Comparing Functions of Chordates

Circulation

Non- vertebrate Chordates

No true chambers

Single loop; 2 chambers

Double loop; 3 chambers

Double loop; 3 chambers

Double loop; 4 chambers

Double loop; 4 chambers

Birds

Function

Fishes

Amphibians (adult)

Mammals

Reptiles


Excretion

Excretion

Comparing Functions of Chordates

Excretion

Non- vertebrate Chordates

Gills andgill slits

Kidney andgills

Kidney andgills

Kidney

Kidney

Kidney

Birds

Function

Fishes

Amphibians (adult)

Mammals

Reptiles


Response

Response

Comparing Functions of Chordates

Response

Non- vertebrate Chordates

Simple; mass of nerve cells

Cephalization; small cerebrum

Cephalization; small cerebrum

Cephalization; small cerebrum

Cephalization; large cerebrum

Cephalization; large cerebrum

Birds

Function

Fishes

Amphibians (adult)

Mammals

Reptiles


Movement

Limbs stick out sideways; muscles and ligaments

Movement

Comparing Functions of Chordates

Muscles,no bones

Movement

Muscles on either side of backbone

Limbs point directly toward ground; muscles and ligaments

Upper limbs are wings; 2 feet; muscles and ligaments

2 or 4 legs; walk with legs straight under them; muscles and ligaments

Birds

Function

Non- vertebrate Chordates

Fishes

Amphibians

(adult)

Mammals

Reptiles


Reproduction

Internal fertilization: inside the female’s body

External fertilization: outside the female’s body

External fertilization

Reproduction

Comparing Functions of Chordates

External fertilization

Reproduction

External fertilization

Internal fertilization; shelled egg

Internal fertilization; shelled egg

Internal fertilization and development

Birds

Function

Non- vertebrate Chordates

Fishes

Mammals

Reptiles

Amphibians

(adult)


Temperature control

Amphibians (adult)

Ectothermic

Temperature Control

Comparing Functions of Chordates

Ectothermic

TemperatureControl

Ectothermic

Ectothermic

Endothermic

Endothermic

Birds

Function

Non- vertebrate Chordates

Fishes

Mammals

Reptiles

Can be controlled by


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