What’s in a healthy packed lunch? This website will help you improve the nutritional quality of the food eaten at lunchtime by children in your school. A measure of memory in children the individual resources and the 3-step programme are designed to be flexible and easy to use, involve and motivate the school community, and lead to continuing improvements that you will be able to measure and reward.
Some of our popular resources: Online audit tool for teachers. Simplifies the auditing of school meal choices and packed lunch provision. Data can be viewed by year group and key stage, as well as totals for the school. Helps identify problem areas and target resources more effectively. The Lunch-O-Matic Memory Master is an online game in which the children themselves do the auditing.
Multi lingual packed lunch leaflet tool. The take-home leaflet that you customise to suit your school is now available in thirteen different languages. Print out your own reward stickers and badges on a variety of common label formats. Customise ready made designs with the names of pupils or additional reward message. Although cetaceans are widespread, most species prefer the colder waters of the Northern and Southern Hemispheres. They spend their lives in the water, having to mate, give birth, molt or escape from predators, like killer whales, underwater.
This has drastically affected their anatomy to be able to do so. The meat, blubber and oil of cetaceans have traditionally been used by indigenous peoples of the Arctic. Cetaceans have been depicted in various cultures worldwide. This section does not cite any sources. Baleen whales have bristles made of keratin instead of teeth.
The bristles filter krill and other small invertebrates from seawater. Grey whales feed on bottom-dwelling mollusks. Generally the teeth are designed for catching fish, squid or other marine invertebrates, not for chewing them, so prey is swallowed whole. Their hearing is so well-adapted for both air and water that some blind specimens can survive.
Some species, such as sperm whales, are well adapted for diving to great depths. Cetacean bodies are generally similar to that of fish, which can be attributed to their lifestyle and the habitat conditions. They have a streamlined shape, and their forelimbs are flippers. Almost all have a dorsal fin on their backs that can take on many forms depending on the species. A few species, such as the beluga whale, lack them. Both the flipper and the fin are for stabilization and steering in the water. The male genitals and mammary glands of females are sunken into the body.
The body is wrapped in a thick layer of fat, known as blubber, used for thermal insulation and gives cetaceans their smooth, streamlined body shape. Sexual dimorphism evolved in many toothed whales. They have a cartilaginous fluke at the end of their tails that is used for propulsion. The fluke is set horizontally on the body, unlike fish, which have vertical tails. Hind legs are not present in cetaceans, nor are any other external body attachments such as a pinna and hair.
Whales have an elongated head, especially baleen whales, due to the wide overhanging jaw. The nostrils are located on top of the head above the eyes so that the rest of the body can remain submerged while surfacing for air. The back of the skull is significantly shortened and deformed. By shifting the nostrils to the top of the head, the nasal passages extend perpendicularly through the skull. In toothed whales, connective tissue exists in the melon as a head buckle.
This is filled with air sacs and fat that aid in buoyancy and biosonar. Other cetaceans have fused neck vertebrae and are unable to turn their head at all. The baleen of baleen whales consists of long, fibrous strands of keratin. Located in place of the teeth, it has the appearance of a huge fringe and is used to sieve the water for plankton and krill. The neocortex of many cetaceans is home to elongated spindle neurons that, prior to 2007, were known only in hominids. In humans, these cells are thought to be involved in social conduct, emotions, judgment and theory of mind.
Brain size was previously considered a major indicator of intelligence. Since most of the brain is used for maintaining bodily functions, greater ratios of brain to body mass may increase the amount of brain mass available for cognitive tasks. Blue Whale skeleton outside the Long Marine Laboratory of the University of California, Santa Cruz. Skeleton of a blue whale standing outside the Long Marine Laboratory of the University of California, Santa Cruz.
Upper jaw of a sperm whale that has been weathered and yellowed. Weathered upper jaw of a sperm whale. The cetacean skeleton is largely made up of cortical bone, which stabilizes the animal in the water. For this reason, the usual terrestrial compact bones, which are finely woven cancellous bone, are replaced with lighter and more elastic material. The number of vertebrae that make up the spine varies by species, ranging from forty to ninety-three. The cervical spine, found in all mammals, consists of seven vertebrae which, however, are reduced or fused.